Hi there,
Yes, it´s about private messages
When I reply it says, message sent, but then, my outbox is empty, and the person does not seem to receive anything.
Not sure what I can do :

Ah, OK.
That's actually normal, believe it or not

Messages only get saved in the outbox if you click the hidden-at-the-bottom "save a copy in my outbox" thingy. It's a silly behaviour of SMF Forums I never found a way to get around.
Rest assured, your message was sent. Whether it was seen and read is another story!
Sometimes people just don't notice they have a new message as there is no pop-up, just the alert at the top of the page. If Madman sees it, I think he'd respond. Patience may be needed as sometimes forum communications are slow.
I'm sure he'll get back to you if he's still interested in your project. If not, just re-post in your other thread and state that the job is still available.
Good luck with it
