Regarding Font

I want to diplay text at location 10,10 using wglUseFontOutlines function.
I am using the glOrtho projection method.
ex. glOrtho(0,640,480,0,-1.0,1.0);
When i am using the about menthod the text goes some where else. I dont know what is happening and where is the mistake.

Did you reset the modelview matrix to identity?