Doesn't sound good. Might I suggest you instead use your default player. Go to LW's menu Tools>Options>Player & untick option & press Apply. This change might not take effect until next time you open LW. If you need another player might I suggest either: QCD: http://www.quinnware.com/ which is free & plays all audio types OR iTunes: http://www.apple.com/itunes/download/ which is also free & arranges your music into artist & album folders for ease of finding.

ALso keep in mind LW's player won't work until LW is settled down. This might take up to 20 mins after opening sometimes or a little longer.