Audigy 2ZS and 7.1 surround sound not working??

[AFK_Matrix]

Hi,

My brother recently bought an Audigy 2ZS but not the one thats gold just the one with the silver back plate and the colour sockets. Now I used to have the Audigy 2ZS gold variety and they worked fine with my 7.1 speaker setup. Now I have given me 7.1 setup to me brother and it doesn't seem to want to work?? Is it only the Gold Audigy cards that can do 7.1?

Thanks

 

[AFK_Matrix]

Sorry should have said that there is sound comming from 5 speakers and the sub but not the 2 rear speakers, thus it seems to be running in 5.1 setup like his old speaker setup. Now the software I downloaded from creative in there autoupdate thing installed fine but the software seems different to when i had the Audigy 2ZS. When I had it there was a diagnostics center for setting up 7.1 surround sound can't find it on my brothers computer at all. I have also changed in the audio thing in control panel to 7.1 speakers and still no luck.