Thank you very much for your answer, Adoado! This didn't helped me with this problem, but it helped me to make some changes in the enviroment mapping to make it faster! That's really nice, you're great!! ^o^

But I'm still trying to make the enviroment texture move with the x/y position... I'm trying to change the matrix, but it still resulting in a empty pointer error. Does anyboy have a hint of how can I solve this problem?

Thanks, everybody!