I'm having a problem where i send my friends links / urls and they don't see that msg at all.  I can see the links and open them when they are sent to me.

I've had this problem before but i dont know what i did to correct it.

The option "allow links in conversations" is checked.

Any help would be greatly appreciated..Thanks

Does the link sent have .info in it?
If so go here:
http://www.msgpluslive.net/scripts/view/329-AllowInfo/

No, it doesn't have .info in it..

Any othe rsuggestions?

Well there is a whole list of things they block:
http://msgstuff.com/news/images/messenger-blocked-words_08-08-07.png

Click that, and if your link had any of the blocked words then it won't send. In future releases they will tell you if it didn't get sent to your contact

I dont think thats it (the blocked words) because i had the same problem a couple months ago and not sure what i did but it started to work..but i just formatted my computer and now i have this problem again..

The links i'm sending now are the same ones i was sending before thats why i dont' think its the blocked words.

Well microsoft update the words every so often, hence way it suddenly stopped working...