Why aren't my front audio jacks working?

My 2xUSB 2.0(I think) are working the way they should,but my audio jacks(one for the mic and one for the headsets) aren't working.
What's the issue here?
The back panel ones are working fine though.
OS is Win7 Ultimate 64-bit.
My MoBo is an ASUS M5A99X EVO R2.0 if that helps.
Thanks. :)
 
Nothing.
This is how it was set in the BIOS before I changed anything:
"HD Audio Azailia Device-Enabled
Azalia Front Panel-HD
SPDIF Out Type-SPDIF"
Changed to AC97,nothing.
I also have the option to choose "HDMI" as an SPDIF Out Type.
What next?
And sorry for bothering you. :)