I'm trying to deploy a web service in JBoss 4.0.4GA. When I start up JBoss, I get the following error:

org.jboss.ws.WSException: ClassLoader not available in meta data
 at org.jboss.ws.metadata.ServiceMetaData.eagerInitialize(ServiceMetaData.java:370)
 at org.jboss.ws.metadata.UnifiedMetaData.eagerInitialize(UnifiedMetaData.java:147)
 at org.jboss.ws.server.ServiceEndpoint.start(ServiceEndpoint.java:106)
 at org.jboss.ws.server.ServiceEndpointManager.startServiceEndpoint(ServiceEndpointManager.java:529)
 at org.jboss.ws.deployment.ServiceEndpointDeployer.start(ServiceEndpointDeployer.java:144)
 at org.jboss.ws.integration.jboss.DeployerInterceptor.start(DeployerInterceptor.java:104)

Any idea what the problem might be? I have deployed other web services with out any problem. Thanks in advance,
David Robison