Hi,
I used wscompile to generate a webservice starting from a correct WSDL.
Deploy went OK, but when I run the client class to test the service I got the following exception in server-side log.

org.jboss.ws.WSException: Cannot find java method: controlloAccessoOperation
 at org.jboss.ws.metadata.OperationMetaData.getJavaMethod(OperationMetaData.java:213)
 at org.jboss.ws.binding.EndpointInvocation.getJavaMethod(EndpointInvocation.java:82)
 at org.jboss.ws.server.ServiceEndpointInvokerJSE.invokeServiceEndpoint(ServiceEndpointInvokerJSE.java:87)
 at org.jboss.ws.server.ServiceEndpointInvoker.invoke(ServiceEndpointInvoker.java:115)
 at org.jboss.ws.server.ServiceEndpoint.handleRequest(ServiceEndpoint.java:209)
 at org.jboss.ws.server.ServiceEndpointManager.processSOAPRequest(ServiceEndpointManager.java:355)
 at org.jboss.ws.server.StandardEndpointServlet.doPost(StandardEndpointServlet.java:115)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.jboss.ws.server.StandardEndpointServlet.service(StandardEndpointServlet.java:76)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
 at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
 at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
 at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
 at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
 at java.lang.Thread.run(Thread.java:595)

I generated the files with the following files:

wscompile input

<?xml version="1.0" encoding="UTF-8"?>
<configuration xmlns="http://java.sun.com/xml/ns/jax-rpc/ri/config">
 <wsdl location="src/main/resources/web/wsdl/ControlloAccesso.wsdl"
 packageName="org.jbpm.bpel.login">
 <!--<namespaceMappingRegistry>
 <namespaceMapping namespace="http://j2ee.netbeans.org/xsd/ControlloAccesso"
 packageName="org.jbpm.bpel.types" />
 </namespaceMappingRegistry>-->
 </wsdl>
</configuration>

WSDL file

<?xml version="1.0" encoding="UTF-8"?>
<definitions name="ControlloAccesso" targetNamespace="http://j2ee.netbeans.org/wsdl/ControlloAccesso"
 xmlns="http://schemas.xmlsoap.org/wsdl/"
 xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
 xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://j2ee.netbeans.org/wsdl/ControlloAccesso" xmlns:ns="http://xml.netbeans.org/schema/LoginTypes" xmlns:plink="http://schemas.xmlsoap.org/ws/2004/03/partner-link/">
 <types>
 <xsd:schema targetNamespace="http://j2ee.netbeans.org/wsdl/ControlloAccesso">
 <xsd:import namespace="http://xml.netbeans.org/schema/LoginTypes" schemaLocation="types.xsd"/>
 </xsd:schema>
 </types>
 <message name="ControlloAccessoOperationRequest">
 <part name="part1" type="ns:Credenziali"/>
 </message>
 <message name="ControlloAccessoOperationReply">
 <part name="part1" type="ns:Identificato"/>
 </message>
 <portType name="ControlloAccessoPortType">
 <operation name="ControlloAccessoOperation">
 <input name="input1" message="tns:ControlloAccessoOperationRequest"/>
 <output name="output1" message="tns:ControlloAccessoOperationReply"/>
 </operation>
 </portType>
 <binding name="ControlloAccessoBinding" type="tns:ControlloAccessoPortType">
 <soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
 <operation name="ControlloAccessoOperation">
 <soap:operation/>
 <input name="input1">
 <soap:body use="literal" namespace="http://j2ee.netbeans.org/wsdl/ControlloAccesso"/>
 </input>
 <output name="output1">
 <soap:body use="literal" namespace="http://j2ee.netbeans.org/wsdl/ControlloAccesso"/>
 </output>
 </operation>
 </binding>
 <service name="ControlloAccessoService">
 <port name="ControlloAccessoPort" binding="tns:ControlloAccessoBinding">
 <soap:address location="http://localhost:18181/ControlloAccessoService/ControlloAccessoPort"/>
 </port>
 </service>
 <plink:partnerLinkType name="ControlloAccessoPartner">
 <!-- partnerLinkType are automatically generated when a new portType is added. partnerLinkType are used by BPEL processes.
In a BPEL process, a partner link represents the interaction between the BPEL process and a partner service. Each partner link is associated with a partner link type.
A partner link type characterizes the conversational relationship between two services. The partner link type can have one or two roles.-->
 <plink:role name="ControlloAccessoPortTypeRole" portType="tns:ControlloAccessoPortType"/>
 </plink:partnerLinkType>
</definitions>

Imported schema

<?xml version="1.0" encoding="UTF-8"?>

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 targetNamespace="http://xml.netbeans.org/schema/LoginTypes"
 xmlns:tns="http://xml.netbeans.org/schema/LoginTypes">
 <xsd:complexType name="Credenziali">
 <xsd:sequence>
 <xsd:element name="nome" type="xsd:string"></xsd:element>
 <xsd:element name="password" type="xsd:string"></xsd:element>
 </xsd:sequence>
 </xsd:complexType>
 <xsd:complexType name="Identificato">
 <xsd:sequence>
 <xsd:element name="Esito" type="xsd:string"></xsd:element>
 </xsd:sequence>
 </xsd:complexType>
</xsd:schema>

web.xml file

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
 http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

 <!-- Production Scheduling Process -->
 <servlet>
 <servlet-name>controlloServlet</servlet-name>
 <servlet-class>
 org.jbpm.bpel.login.Impl
 </servlet-class>
 </servlet>
 <servlet-mapping>
 <servlet-name>controlloServlet</servlet-name>
 <url-pattern>/controllo</url-pattern>
 </servlet-mapping>

</web-app>

And finally the webservices.xml file

<?xml version="1.0" encoding="UTF-8"?>
<webservices version="1.1" xmlns="http://java.sun.com/xml/ns/j2ee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
 http://java.sun.com/xml/ns/j2ee/j2ee_web_services_1_1.xsd">

 <webservice-description>

 <webservice-description-name>
 Controllo Autenticazione
 </webservice-description-name>
 <wsdl-file>WEB-INF/wsdl/ControlloAccesso.wsdl</wsdl-file>
 <jaxrpc-mapping-file>WEB-INF/jaxrpc-mapping.xml</jaxrpc-mapping-file>

 <port-component>

 <port-component-name>ControlloAccessoPort</port-component-name>
 <wsdl-port xmlns:portNS="http://j2ee.netbeans.org/wsdl/ControlloAccesso">portNS:ControlloAccessoPort</wsdl-port>
 <service-endpoint-interface>
 org.jbpm.bpel.login.ControlloAccessoPortType
 </service-endpoint-interface>
 <service-impl-bean>
 <servlet-link>controlloServlet</servlet-link>
 </service-impl-bean>

 </port-component>

 </webservice-description>

</webservices>

I hope my information are enought to get a solution. Bye