I have two separate workbooks I wish to share with others on the same server.
Both have all the right boxes ticked for sharing, but every time the 'other
person' opens them it is 'read-only' and has to be saved under a different
name if they alter it - with the result that we end up with two parallel and
confusing editions of the same workbook.

I have several other shared workbooks on the same server, with the same
boxes ticked, and they function normally.

I'm running Office 2007 Professional Plus on Windows 2003 server.

Has anyone any suggestions please of what could be going wrong.