Z77-D3H Rear speakers not working in 5.1

[Miggs]

Hi,
As title says, cannot get any signal to the rear speakers using the on board Via HD audio.

Creative 5.1 system wired up correctly, all ports set to default and correct, 5.1 selected in windows and Via audio deck. Rear speakers are silent when run windows speaker configuration test.
If I swap the ports, they work and the front don't so no wiring issues.

Even tried the basic VT2021 drivers from Via. No luck.

Any ideas?

[dmdilks]

Do you have them plug into the orange, black, & green ports. One other thing you can try is try the 7.1 configuration.

[Miggs]

Hi,
Yes as I said, ports are correct.
7.1 does not show up as an option.