ok, i have the logitech z-5300e 5.1 speakers, i got them about 2 or 3 years ago, and due to space restrictions have not been able to use them for about a year. i just brought them out again and am looking to get some 5.1 going again. the problem is that 4/6 channels are workign correctly, only the rear speakers are not producing sound. all the other speakers work properly with my sound card application (when i hit center speaker a sound gets played in ONLY the center speaker, etc.). so my rear speakers are the only problem, i have checked the connections between all components, made sure the 5.1 switch on the sub was actually at 5.1 like 4 times, and have tried different ports on my mother board. my mobo is the gigabyte ga-ep45-ud3p, with the realtek azalia chip. i have also updated my drivers to the newest one from gigabyte's website. any help? im out of ideas on what could be wrong.