Need help with Vray

[stathis]

Hi!!!I'm a user of the great renderer (what else)Vray!
But i have a problem these days...I have a scene and i want to render it with V-ray (hdri,GI,)
when i push the render button a vray messenger tell me that the colours are overbrighted and the colours are invalid...anyway..i let the render to process and when it finish i saw big dots with some colour variations can you tell me what to do?
Friendly Stathis!

[natty]

Give us a run down of your materials and general settings ..