Client Jarring/Jarsign Really weird problem?

Hello,
The problem is when i jarsign my client and i really know how to jarsign its giving an error it says:
Could not find the main class: java. Program will exit.
And i downloaded Hybrid PVP V3 and editted the Webclient Ready thing.
ANd the weird thing is, when i dont change anything in the client like the names it wont give an error and it just work but when i change every Hybrid PVP name to an other name it gives an error.
Can someone help me or do it for me?

Thanks, Remco.

whats the manifest your using?

Just client

im doing it good but when i changed the names in the client its just over and wont work and give that error..

Could u help me please?


Remco