Msn doesn't add/invite others

Whenever I go to do trades and request or get requested to add someone's msn, it often doesn't seem to invite or add the other person.

Usually the other person confirms that they didn't receive a request from me, or that I still didn't add them.

This has caused me to lose several sales because I can't contact some people.

 

Unistall and re-install your msn. That usually fixes all problems with msn. Or, go to tools > options > and click on the allow all button. Hopefully that'll fix the adding people.