Soundblaster driver problems.

Hi wonder if anyone can help,
Since i got my pc i cant get the two rear speakers to work on
the soundblaster x-fi extreme audio sound card, the speakers work
fine running of the motherboards audio.
Tried various drivers including latest from creative website but no joy,
Quite sure the leads are correct cant really go wrong have setup for
5.1 surround and all that.
Am running windows vista home premium 32bit, intel core dual 2.66ghz, 2gb ram
All the other speakers are fine.

Any help thanks in advance.

 

Plz forget previous post, After ages i found out mt fader on front
speaker was not turned up enough and i wasnt hearing back
speakers during test..... rolleyes