spore creature creator wont run

so i load the game, it comes up with the inital screen then shuts off, any clues why, it worked last night then today nothing, just got it and its the trial version, gonna buy full today if i fix this one. i want spore so bad but if my pc wont work right then we have problems

i run a gforce 6200 8xagp 2gb ddr ram, 2.0 gh sempron on win xp pro, yeah my system blows but it has pretty blue lights