Sent messages not showing

[shop4fundeals]

Someone sent me a message, and I can see their message. But when I replied, I could not see my reply in the "sent" tab. I would like to make sure my reply was sent, but the sent tab just says "You do not have any messages.". Any idea why?

[nikpeak1]

Trying to send msg failing

[apeltim]

Same!  Replied messgages are not being displayed in my "Sent" folder.  I believe the messages are not being transmitted or recived. 

[p1e1s1]

I have the same problem.