Big problem since i've tried to install sound card

Hi,
Today i bought a brand new Creative Sound Blaster Live! sound card and tried to install it. (just opened the computer and sticked the card in the motherboard..) But now that it's in, my pc won't startup anymore and if it does, it doesn't detect the card :(
The guy in the store told me that there wasn't any install-software in the package because XP auto-installs it.. But appearently it doesn't and i've thrown away the ticket so i can't bring it back..
Please don't ask me any technical specs about my pc, because all i know about it is that it runs on XP..
I only use my Windows-pc for FS because for daily use, i prefer a mac. But since i'm a member in a VA, i need to do at least 1 flight per month or i will lose my membership and my saved flight hours..
Does anyone have some advice plz..? :(
Today i bought a brand new Creative Sound Blaster Live! sound card and tried to install it. (just opened the computer and sticked the card in the motherboard..) But now that it's in, my pc won't startup anymore and if it does, it doesn't detect the card :(
The guy in the store told me that there wasn't any install-software in the package because XP auto-installs it.. But appearently it doesn't and i've thrown away the ticket so i can't bring it back..
Please don't ask me any technical specs about my pc, because all i know about it is that it runs on XP..
I only use my Windows-pc for FS because for daily use, i prefer a mac. But since i'm a member in a VA, i need to do at least 1 flight per month or i will lose my membership and my saved flight hours..
Does anyone have some advice plz..? :(