Please update your driver jar to Version 4.x.
Version 3 might not be fully compatible with SQL Server 2008.
Last time I checked for such a driver its version was sqljdbc_4.0.2206.
Latest version available is sqljdbc_4.1.5605.
Depending on your JVM you should choose the right jar file:
sqljdbc.jar Class-File-Version 49 Java 5
sqljdbc4.jar Class-File-Version 50 Java 6
sqljdbc41.jar Class-File-Version 51 Java 7 and newer.
This Driver is a pure Java-Driver (Type 4) so it is platform-independent.
The Jar should be placed under IntegrationServer/packages/WmJDBCAdapter/code/jars.
Reload the Package WmJDBCAdapter afterwards.
If this does not work, try to shutdown and restart the IS.
Regards,
Holger
#webMethods#Adapters-and-E-Standards#Integration-Server-and-ESB