Help Please Panicing !

I have just receive my new and boxed NVIDIA Geforce 8800GTS Card today and i have baught this to Sli it with my currant 8800GTS.
The problem is that i have put it in PCI E slot 1 and my older 8800GTS in slot 2.
My PC can see my old card in slot 1 but does not see my new graphics card ! Both cards have the exact same specs and are sli compatiable. I have to plug my DVI cable into my old card to get a picture on my screene. I downloaded the lastest drivers from windows 7 64bit as this is they OS for "higher FPS" on high proformance games. My Rig is as followed:


Processor: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz (4 CPUs), ~2.4GHz
Memory: 4094MB RAM 1066HRTZ
Video Card: NVIDIA GeForce 8800 GTS 512 (x 2 now)
Operating System: Windows 7 64Bit CR
Motherboard: Asus Striker II Formula (3 way sli compatiable)
Computer Case: Antec Gaming Case (with extra fans)
PSU: Corsair 620

If anyone can help me il be more than greatfull.
I can communicate by any methods thank you

P.S. The cards are connected by the Sli Bridge also

Il do that now but my PC cant even see it in device manager, the fans spinning on the card. BRB 2 mins il look in the BIOS thanks

Anything that mentioned anything to do with NVIDIA Graphics i enabled (there was nothing saying SLI though ) Il try putting them into ports 1 and 3 now i dont think it will help though cos atm my visual is comming off my old Video card which is in port 2. But il try that 1 and 3 thanks. My PC just wont see it at all

Thank you very my since putting the cards in slot 1 and 3 i am now able to get an image on my screeen now i just need to find out how to enable SLI (oh actualy i have noticed that i dont have my sli bridged on my cards i forgot to put it back on ! fingers crossed when i rr n put it back on i will still have an image ! lol thanks very much for all your help i hope it works RRing and putting the Sli bridge back on and il post to tell you how it goes !! )

Have you ever seen anyone less self prepared to make a major system transition?

You realise this is the forum where people have come complaining that their PCIx card didn't work in the pci slot after they "cut off the extra pins to make it fit" right? lol