Sounds like a sound configuration issue to me. As with all audio problems – start with the basics:
– Make sure your speakers are plugged into the right jacks on the back.
– Make sure you have the upfaders down on the channel being cued, and (if using it) the crossfader to one side.
If you go over all the switches and such and they seem to be where they need to be, then it’s likely a configuration issue. Take a screenshot of your audio configuration window and I can try to help. As it’s LE, there shouldn’t be too much to tinker with.