I think I have understood what happened. I changed light position every moment in order to see wtf happened with them. But I've already seen that if I put just the middle point of the sphere of the omni light, inside any place, it will not work.
I put onmi lights everywhere, but always hiding just the middle point of the sphere, now I think it will work... im rendering!! omg.. so slow!!
Do you know any "trick" for rendering quickly?
Greetings
Hello thomthom!
I have SU version 7.0.8657 and V-Ray version 01.05.30.
I think it is for my SU version... It is very strange, if i open new file, with some models, lights are OK in renders. But in my model everything is off... 
Hello all! 
I am new in this forum but i am sure that i can find the help I need! hehe
My problem is that, in my model, all the Vray lights are switched ON, everything is ON, GI is ON... But!!
But! When I click to Render, in the picture everything is OFF, no lights, no environment... no.. sun??
I don't understand! I can see my model, (dark, but no black, i can see my model with darkness), but i don¡t know what more to do...
Could anyone help me??
Thank you!!