New
#261
Sorry for digging up an old post..
but i had the same issues for ages, i recently just upgraded my computer and had the same problems, however as i plugged each cable in i got a pop to confirm what i had just plugged in, choosing rear speakers never worked.
However i then took it out, plugged it back in and chose 'headphones' with the sub/centre and front both configured to their own options.. and i now have all 5 speakers working together :)