This problem has been plaguing me for over a year now. I have a Sound Blaster Audigy and Altec Lansing 5.1 speakers (251 is the model?). The i/o ports on the sound card are not color coded, and my three plugs for the speakers are (black, yellow, and a light tan). Which plugs go where? I've tried EVERY combination and can not get all speakers to work with the speaker switch in 6 channel mode. I can get them to work, but it is only 4 channel . Please some help get my 5.1 system up! A picture of your connections would be nice if possible! Thanks in advance for any replies.