When I put my text on screen with OpenGL the text is blue and I can't change the color.

Let me guess. You have a textured object in your scene? OpenGL is a state machine. When you enable texturing it remains enabled for all objects until you disable it. When you specify a texture coordinate that coordinate applies to all subsequent vertices until you change it. Disable texturing before you display your text and re-enable it afterwards.

Of course, it's possible that my guess is wrong. If the above doesn't work let us know and we'll try and see what else it could be.

Enigma

But there is one more problem, it was normal before I upgraded my graphic drivers. On other computers it works normal.

What is your graphics card/drivers? Try settings materials, lights, and anything else that could affect the color of the text. New drivers may assume new default values?

Yeah, it didn't work anymore because I upgraded the graphic drivers.

Ati Radeon 9800 SE

Problem solved.
Thanks all!!