Look at your motherboard manual to see the jumper map, that way you can figure what jumper sets what.
Then, with your comp off, carefully move the jumper accordingly.

If after that your card still doesn't want to be detected, try it at a friend's. If it works there, I don't know what's wrong, try moving it to another pci slot, if it doesn't work at a friend's, then the sb is defective and needs to be replaced.