What about the name of the room? Is it possible that you're typing in a name
that's resolving to something other than the mailbox?
You did set Author permission on the Calendar folder, right?

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Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Thanks Sue; YES, I can open it from my PC with the File, Open, Other Users
> Folder, Calendar, etc.
> Rick
>
>> Can you open it with the FIle | Open | Other User's Folder command?
>> > Hi Sue, I'm very close and setup the mailbox as a Direct Booking then
>> > logged
[quoted text clipped - 10 lines]
>> >> conference
>> >> rooms as a resource and to be able to schedule them.