Hi - I just downloaded limewire pro and am having the following problems - if anyone can help me out that would be great!

(I use a powerbook g4 MAC OSX)

1. Everytime I run limewire there is a strange low buzzing kind of purr of a noise that I have never heard with any other program. It's kind of annoying and makes me wonder if there is something wrong with this program...

2. About 90% of the music I try to download says 'cannot download'. I read the FAQ's but I still don't understand why this should be happening so much.

3. nothing happens when I click on CHAT

4. Last question, i promise - (I am also a new MAC user) what is the difference between a sit file and a dmg file?

If anyone can help me out with any of the above, THANKS!