java.lang.NoClassDefFoundError: com/entrust/toolkit/security/provider/Entrust

I am trying to connect from java api from windows to wM IS server (7.1) running on unix and I am receiving the following error:

java.lang.NoClassDefFoundError: com/entrust/toolkit/security/provider/Entrust

I read in some of the forums that I need to use jre 1.4.2. So I swithced from jdk 1.6 to 1.4.2 and still I am facing the same issue.

Can any body help?

This is a production issue. Can anybody help on this?

can you paste full stack trace? Is SSL being used here?

http://www.wmusers.com/forum/showthread.php?t=4068