some gamma problems with winxp and geforce2MX

well, a couple months ago, i bought a new computer, with winXP and a geforce2, i was dissappointed to find that some of my games (despite making gamma changes in winxp) are really dark, to a point i cant play them, when i leave the game, i find that my desktop gamma has reset itself to factory default (which is really dark) is there any way to fix this?

btw, yes i have newest drivers and all