Mazda RX8 sound problem with Car2PC
 

I am facing a problem with the integration of Car2PC interface in my 2004 RX8,EU standards.I have btw the 9.55 firmware on board.
Actually,I cannot hear anything!Lets start from beginning:I used to have the PIE MAZ/ALP interface,which used to work very well.
When i changed to Car2PC,even though i followed the instructions - connected the interface at the cd-changer port in the back of the HU,and at the other end at the lineout of the M/B,with the usb attached to the PC - I don't have sound at all.The Car2PC is found in Windows Media Center 2005 that I have,and Winamp can accept orders from the wheel controls,but no sound ....
A difference that i noticed is that with the PIE MAZ/ALP interface,the EX reading at the HU,kept flashing while in use (while selected) - and that way i could hear sound,while the Car2PC doesn't flash and i cannot hear sound...The reading is EX 1 1 something

Any ideas would be appreciated...

Yannis