Class conversion Error

Hi Friends,

I'm new to Java card technology. I set the environment variable and the remaining properly. I'm usingJava 1.6 andJava card 2.2.2. After compiling the Java file successfully, when i try to convert the class file into JCA or CAP it says an error "unsupported class version 50.0". I don't what it means and how to rectify that?

[376 byte] By [Prakash@sun.javaa] at [2007-11-27 5:36:06]