first compile issues error

I installed the JDK 5.0 Update 6 with NetBeans 4.1 Bundle onto my windows 2000 machine, created the HelloWorldApp program and compiled it successfully.

However, when I rin it, I get the folowing error messages:

Exception in thread "main" java.lang.unsupportedclassversionerror

(Unsupported major.minor version 49.0)

Does anybody have any ideas as to my problem?

Thanks.

[407 byte] By [aronoffsa] at [2007-10-2 10:36:42]