Iturea
Ok, first thing, that older cooler is not gonna get the job done, next thing, the cpu socket it turned 90 degrees, its not like all the others and many have put their hsf on backwards

so make sure the cpu and socket ledges line up.
Also make sure that you connected the 12v 4 pin power to the board as well as the atx.
That board when set up properly should be running 11x200 easy, so here is a faq for your to check out, covers the basics of all the gigabyte nforce2 boards
Gigabyte New Owners Faq
Laterz,
dafanman