I have read some topics about this problem in this forum, and I have tried to follow the suggestions, but I didn't have success.

1) I copied mysql-connector-java-2.0.14-bin.jar to directory: \jboss3\server\default\lib

2) I modified mysql-service.xml, changing the lines:

<config-property name="ConnectionURL"
type="java.lang.String">
jdbc:mysql://localhost/work</config-property>
<config-property name="DriverClass"
type="java.lang.String">
org.gjt.mm.mysql.Driver</config-property>
<config-property name="UserName"
type="java.lang.String">myusername</config-property>
<config-property name="Password"
type="java.lang.String">mypassword</config-property>

and copied it to directory: \jboss3\server\default\lib

But, when my client application tries to execute:
home.findByPrimaryKey("ASPPI");
then an Exception is thown:
MySqlDS not bound.

In mysql-service.xml there is an obscure paragraph:
--------------------------------------------------------
<!-- Include a login module configuration named MySqlDbRealm.
Update your login-conf.xml, here is an example for a
ConfiguredIdentityLoginModule:

<application-policy name = "MySqlDbRealm">

<login-module code = "org.jboss.resource.security.ConfiguredIdentityLoginModule" flag = "required">
<module-option name = "principal">yourprincipal</module-option>
<module-option name = "userName">yourusername</module-option>
<module-option name = "password">yourpassword</module-option>
<module-option name = "managedConnectionFactoryName">jboss.jca:service=LocalTxCM,name=MySqlDS</module-option>
</login-module>

</application-policy>
---------------------------------------------------------
what does it mean ??
Luigi Fonti