Could not find the main class ?!??!?!

So i am trying to download a game of the internet. I have downloaded and installed it but the problem comes when trying to open it up.

I get this message upon opening:

Java Virtual Machine Launcher

Couldnt not find main class. Programwill exit.


I am running Windows XP home edition

I have jdk1.6.0_12

I think it could be to do with the enviromentla variables but not sure

if this is the case please could you tell me what the value(s) should be ?

Thanks in advance

Tom