My windows live messenger won't let me send any messages?

Everytime I try and send a message to someone it says "The following message could not be delivered to all recipients" any ideas why it says this? My internet conenction is working fine and I've troubleshooted everything it told me to and nothing appears to be wrong? Anyone got any ideas? Much obliged

My windows live messenger won't let me send any messages?microsoft windows xp

I absolutely hate when that happens. It happens when I've been on MSN for too long... like if I leave my PC on over night and come on the next day to it, so I have to exit the actual program and go into it again and it work fine. It's nothing to do with DNS/Connection and all that crap. It's just the program being crappy. Restart it.

My windows live messenger won't let me send any messages?ie 7 internet explorer

Could it be the people you are trying to send to are off-line? If not there could be some kind of external firewall blocking it. If so there is a web based version of msn you can use

http://webmessenger.msn.com/
this could be there interent connection is wacked or they are offline sometymz when im running 4 or more convos or interrent tabs at one tym it happens to me. also re-downloadin the version of msn helps
try sending them with the normal messenger mate.
Yes that has happend to me, you should either re download it or i just reset my computer a couple of times, or normally if you type somthing and it wont let you send it click search, it will come up with a load of rubbish but you get your message across
recipients are offline most likely, your internet connection is slow and unable to connect or you need to update your version of messenger.... Good luck