I am a new user... the first 2 downloads came out as MP3 files - look like little bits of film strip with quicktime player symbol in middle - played beautifully, very pleased.

The next downloads came out looking like documents- like a piece of paper with a dog eared corner which I can't play. That is all I can download now.
When I go to info on my Mac it says it is a LimeWire document.

I am using MacOS 8.6 and have installed carbon which I read somewhere might help. Have tried everything how can I download files which all come out as MP3 files like the first two did. Why are they now coming out as documents.???
I have spent hours and hours I am desperate please help.