Question : Problem: NO SOUND AT REAR AUDIO PLUG

My ECS 761GX-M754 mainboard has sound at the front audio connector, howerever there is no sound at the rear audio connector.
Thanks in advance for your help.

Answer : Problem: NO SOUND AT REAR AUDIO PLUG

Not sure about the config since its ac 97 it should be explained at this link. If you have sound in front you probably have something on this?? http://www.intel.com/support/motherboards/desktop/sb/CS-015851.htm
Have you checked the device manager? anything there? right click on my computer go to bottom of drop down select properties > select hardware tab > click device manager > select  sound video and game controllers. Also what revision of soundmax are you using? I believe most current is 5.2. Also check in preferences if you have auto detect on?  there should be a pink a green and a blue. make sure as stated above its in the green.  have you manually configured any of the the audio properties? have you defaulted the audio settings?