Recently I seem to have been having trouble with PMs. I've sent quite a few, however they don't show up in my outbox and the people they are addressed to don't respond. Does anybody know why this seems to be occurring?

No problems with either and I send a bunch of them have you set "Profile>Modify Profile>Personal Messaging>Save a copy of each personal message in my sent items by default." or do you rely on setting it manually?

strange....  it was unchecked. not how I remember it but whatever. at least now I know they're sending. thanks Dena!

Sad but true fact: people often don't reply to PMs...there's a raft of reasons - busy, other stuff going on - but sometimes they haven't set up their profile to notify them of a new PM with a pop up and they just don't realise they have a new message. Hopefully they'll get back to you ASAP...