Blackberry Curve 8530 MSN error

Hello,

I have a BlackBerry Curve 8530.
For about 2 months I have been using MSN Windows Live Messenger as an app, but recently I've been having problems with it. I can sign in fine, but when I try to send a message it says (Error: Internal Server Error.) The person on the other end can receive my messages, but I cannot receive theirs and this is very frustrating. I have tried signgin into other accounts and nothing changes. I have also deleted MSN and downloaded it again, which does not work. I have taken my battery out many times and restarted my phone, which has not worked either. I have looked for the updated version, but it says I have the most current one.

Any help would be greatly appreciated!!!

Thanks