can u get your card checked in some other PC? as u might not be aware of your hands, and it might have misplaced/effected some transistor (that small cylinders on card).
also, some possibility of static electric shock.
best is to get your card checked oin some other PC, still dosnt works, get it exchanged.
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"