how old is your computer?
Dell Dimension L550r, win98se, 7Gig and 5Gig harddrives, Lite-on Ultra+ cd-rw drive, zip100 drive, floppydrive, soundblaster live 5.1, Dell 770s Monitor, built-in intel 80810e graphics, lacks the new graphics card support. made in 2000-2001. that's old. (at least to me!)
the thing that makes SGDK2 not work is the graphics card. map editor and the game itself doesnt work. everything else is ok.