DB2's jdbc driver is a type 2 driver, that means it uses native code to connect to the database. Probably the driver can't find the required shared libraries. You have to add <db2>\sqllib\bin and <db2>\sqllib\lib to your PATH (windows) or LD_LIBRARY_PATH (unix).
I have already added LD_LIBRARY_PATH on red har linux like this in classpath LD_LIBRARY_PATH=:/home/db2inst1/sqllib/lib
After deleted my changes in jbosss.jcml also not starting jboss server ..
i don't know what could be the problem ..
If you know pls help me out