5.1 AND 2 speaker setup on A7N8X Deluxe?

[Telexen]

I just setup a set of 5.1 speakers using this setup:

Line out - front left/right
Mic in - center/sub
line in - read left/right

The board has two other connections, one for Center/Sub and one for Rear left/right aside the SPDIF output, but for some reason they don't work right

How can I add my standard 2 speakers to that also if I can't get the surround connections on board to work without adding another soundcard?

[gambler2611]

What you're proposing is dolby 6.1 which is only supported by a few sound cards on the market. The probability is that without getting another sound it just ain't gonna work.