Help...Best Config?

[dannyg]

I want to start using Cubase 5 but i have no sound.
My System :
Core i5 750
Gigabyte G55-UD4A with ALC 889 on board
+Logitech Z-5500 with SPDIF cable connected
4 Giga RAM
Realtek 2.40 Driver installed
Also Installed Asio4All 2.10 Beta with 256 Samples

What should i do?
1 Mono input for the Mic is being used
and i want 5.1 sound

Pic :
img188.imageshack.us/img188/8426/asiof.jpg

Thanks in advance