I've had Cambridge Soundworks Desktop Theater 5.1 DTT2500 Digital speakers coupled with a Sound Blaster Live Value card for about 5 years now. I recently got an Audigy 2 ZS. I know these speakers are old, but I'm not getting 5.1 sound with them. Whenever I do the speaker tests in the control panel, I only get sound out the right front right/left channels. DVD audio also doesn't play. The speakers are connected with digital outputs. Am I doing something wrong or is it time for some new speakers?