vray camera network render prob

I have reinstalled vray sp4 and max 2009 on a laptop with windows 7 which was working fine but was having trouble loading a irradiance map. if i send a scene to network render this machine will render it it is a vray scene with a max camera but if I use vray camera it wont network render I get the error message ERR an unexpected exception has occured in the network renderer. I canoot figure out why if it will render a vray scene why it wont if there is a vray camera , any thoughts?

Doing my head in

Also since this is a network rendering machine and the 30 days grace period is up I cant open max and try to open the project locally to see if there is a problem.

ARRRGG it worked before is what is driving me mad..

OK if I have a complet vray scene and render any view or max camera it works , if I use a vray camera its shows the error " unexpected exception " Also the last thing I on the max render dialog is " preparing camera sampler "

FYI - You can transfer the license temporarily using the “Portable License Utility” and then transfer it back.

Just in case anyone else gets this problem in the future the solution is the user security level in windows 7!! ONLY took me three days to find that out…jist lower the security and the network rendering will work again.

Adam