Ok I'll try to be nice to this guy
LOL.
First of all I need to know a few things.
Lets start with the basics:
Do you have any add-ons attached to MSN?
What kind of internet do you use?
How long does it freeze for?
Have you tried this out on another persons computer?
Can you use a web messengering system properly? (Without any problems)
You should describe the problem you are having with a bit more detail.
Then I'll try to help as best I can.