Problem using the javax.crypto lib on Win95

Mahadevan Iyer (iyer@internetdevices.com)
Sun, 27 Sep 1998 23:37:34 -0700

I installed JDK 1.2 + JCE 12-beta1
When I try to use the jar file I get the following error

error:Invalid class file format: <jar file
path>(javax/crypto/KeyGenerator.class), wrong version: 46, expected 45
.. Class javax.crypto.Keygenerator not found

What could be the problem here, did I download a bad jar file ?

Thanks