Sorry, my english is not very well! So I will try to distcripe my problem as much as I can!
Since I have installed Win XP on my computer, Serious Sam1 had not run anytime. I tried to install OpenGL, but WinXP called that OpenGL just compatible with Win95/98. By the way, Serious Sam 2 works without OpenGL. I thought if Sam2 runs on WinXP, so Sam1 must runs too, right?