I am having a lot of trouble with the gluPerspective() function. For some reason even though i can rotate an object nice and smoothly. If i even use the same variable to move it back it just disappears even after one unit. i guess the clipping plane or whatever is off. but i think i did it right. any ideas.

gluPerspective(45.0f,fAspect,1.0,425.0);

fAspect is window width/height

I think I have answered this question already in another thread. But since I am here I will answer it. You are not translating the object far enough away from the clipping plane if you're trying to rotate it on X or Y. If you are talking about moving the or translating the object on x,y,z you need to increment the keyboard input by a smaller number. Start with that....