I have managed to solve the audio problem. I am using an on board sound device but for some reason VSX5 is not "seeng it". Luckily my capture card has an audio input scocket. So feeding the audio input to it has solved the problem.
I will now construct a toggle switch so that I will be able to switch from the card socket to the input socket on the MOBO. I need to have it for some older applications that do not recognize the pass through.
I also needed to install an AC3 filter since after installing VSX5 all my previous movies and audio files with AC3 did not play
Every thing is working fine now