5.1 help? sound only through one speaker...

[noobert]

i got a z5500, which is 5.1, and everythings hooked up right, with the green,orange and black cable leading to my sound card (Sound Blaster X-Fi Titanium Fatal1ty Champion Series) . however, i have completely no idea how to set it up. on the creative control panel game mode, i press channel, it is supposed to test individual channels, but the audio only comes through the front right speaker. when i press test on the speaker itself, it works fine, and on the creative control panel, i already selected 5.1 speaker. can anyone help me?