Resources

Strange occurrance that just started happening. First we use mailboxes
(Exchange accounts) for our resouces. We are running Exchange 2003 with a mix
of 2K3/2K7 outlook clients.
We have 3 resource rooms. When I try cretaing a meeting with one of the
resources, I get a message that basically says that it can't allow the
meeting to be registered because it is recurring, but it wasn't set up as
recurring. The other 2 resources are fine.
That occured this afternoon. Now when I try it for the same resource, I send
the request for the meeting but I do not receive a popup saying that the
message has been booked. The other 2 resources are working fine.
This does occur from different clients running 2K3 and 2K7

Thanks