The comments are misleading.
First, what RDBMS are you using Oracle? The 'pad' option was added only as a workaround for an Oracle bug. This appears to have been resolved in later releases of the Oracle JDBC driver (10 Release 2). To set this you would uncomment the line in the jboss-service.xml file in the XidFactory section. Note, this file can be found in your server/conf directory:
<mbean code="org.jboss.tm.XidFactory" name="jboss:service=XidFactory"> <!--attribute name="Pad">true</attribute--> </mbean>
Again, if you are not using Oracle, or using the latest Oracle release, this is not necessary.
Please take a look at the JCA Faq referenced by the sticky thread at the top of this forum as well.
Thank you little brother ;)
Im using the new Oracle driver version.