Why are all my mp3's downloading as QuickTime files???

[madadman]

I'm new to this forum but I've been using LimeWire on a mac for about a year without any problems.

Lately every time I download an audio file it comes up as an unplayable QuickTime file. They used to download in iTunes format - which is what I want. itunes won't convert them and QuickTime won't play them.

Any one know why this is happening and how to fix it? I read a thread from someone about using a program called 'file buddy' but there's gotta be a simpler way. Doesn't the mac have internet settings that allow you to set the formats of incoming files - or something like that. Any help is really appreciated.

(p.s. I'm not a 'computer guy' so the simpler the solution the better.)