Connection Keys suddenly stop working

[F23]

I'm at the end of my rope on this one. The client is ticked and we've never had
this happen before.

We moved a site to a new server 2 weeks ago. After much trouble getting
Contribute to connect to the site we finally got it to work. We ended up
deleting the connection files on the server and just starting over.
Sent the client a connection key and it worked fine. They could edit pages and
go to town.

This week the client goes to a page and it tells him that he is not authorized
to edit pages. I try the same connection key we sent him and it tells me my
roll has 'expired' and I need to contact the admin.

I've locked this site down tighter than a frogs butt in water; no one has
access to the contribute keys or its settings. Why would Contribute do this?
Has anyone had this happen?
Should we start over again? Remove all the files (including the LCK files)?

Thanks in advance for any insight.

[ThinkInk]

Maybe reading this post will help?

[url]http://www.adobe.com/cfusion/webforums/forum/messageview.cfm?forumid=55&catid=302&threadid=1368 126&highlight_key=y[/url]

[F23]

Well yes, it did help..when I posted 2 weeks ago.

The site was working and you could edit all the pages. 2 weeks later it's
kicking out authorization errors and telling us (the administrators) that our
role is no longer valid.

I think it's time to start developing all our sites using a CMS....