Hibernate3 error(antlr.jar) on SJSAS 8.1 EE

I have Hibernate3 app deployed on 8.1EE. After a simple select query I am getting this error in the logs.

charScanner; panic: ClassNotFoundException: org.hibernate.hql.ast.HqlToken

I am using antlr-2.7.2.jar file. I copied it to server_home/lib and also in server_home/lib/endorsed and also added the classpath-prefix in the domain.xml. After all this I still get a ClassNOtFoundException Can anyone please suggest a solution.

Thanks.

[459 byte] By [ndnguy] at [2007-11-26 10:18:13]