Is it the limewire player you are trying to play these songs with ??
If it is the lw player is not always very reliable and can be known to work when it wants...
Try using a 3rd party player like itunes or WMP, if you make one of these players your default player, when you go to preview a file the 3rd party player will launch it...
To disable the LW player go to Tools > Options > Player and untick the box and select apply...
To make WMP or itunes your default player
Go to your shared folder (outside of Limewire) you will find this folder by clicking on one of your files in your LW library and clicking explore...
Right click on one of your MP3 files
Select open with
Select choose program
select the player you want
and tick the box that says always use this program to open this file type
Select OK
