|Your post makes no sense and you haven't provided enough info. |
"only two out of my speakers work in lfe".
LFE stands for Low Frequency Effects. So are you saying your subwoofer works along with one other speaker?
And if your system works while using the red and white connections, then use those.
Also how are you trying to create the 5.1 effect? Are you using Dolby Pro Logic II or the SRS (circle surround mode)?