Try the song in another player & see if it still has problems. And be aware of songs from T3 sources; see this point here: Downld/Upld Problems Sticky

If you're not happy with LW's media player, you can disable it by going to Tools>Options>Player & unticking & pressing apply. This will mean your default audio player will play instead. But it won't take effect until the next time you open LW.

Some other decent players: 1. dBpowerAMP, - 2. WinAmp, - 3. Quintessential (QCD), - 4. iTunes
* Good tagging tools: http://massid3lib.sourceforge.net/