Contribute - "This page is locked" message

A client just installed Contribute CS5 and is getting a message, “this page is locked” and that I am editing it in Dreamweaver which I’m not. I did not give her a Key and did not turn on or off Check-out files. Is there something I forgot to do in set up or something I need to do on my end? I’ve never set up Contribute for a client before so don’t know much about it.

Thanks so much in advance!