Graphic card problems

[sublime90]

i dont know where else to ask this so i'll try here. im trying to install my geforce fx 5200 on my pc and heres the problem. i install the card, plug my monitor into the card (like ive done millions of times installing this) and power on my pc. now when i power on everything starts like it should but right after the windows xp screen comes up my monitor says "no signal" and turns off. i even tried disabling my on board graphic card first but still the same thing happens. so how can i get my graphic card working. im also new to XP and its the first time i tried installing my graphic card using XP, i never had this porblem with ME. any help is appreciated this is really aggrivating me.

thanks
sublime90