Dual screen

I recently installed a PCI graphics card and a second monitor. I'm running Windows XP btw. How do I enable the second monitor? I don't even get a signal input.

Thanks!:confused:

p.s.
Anyone know where I can get any cool screen savers for dual screen, kinda like that hacking bit in Swordfish :D

Well, make sure that it's installed properly and opent he display properties and on the settings tab, check to see if there's a dropdown list that has the two graphics cards in it. If it doesn't, then it's not installed correctly. Post back with your results.