Sound card problems

Hey everyone, I have Sound Blaster Audigy 2 ZS and I'm running Windows Vista 32bit and for some reason, I can't get the drivers to install, which are from the Creative[dot]com site. Say that the product is not installed or something. Does anyone have the same card thats running on Vista that could help me figure this out. I do have sound but the sound is so faint I have to turn my speakers up more than half way, which originally I had to put it on 3 bars. Speakers are Logitech Z5500.