problems saving modified files on a NAS server.


Whenever I open a spreadsheet stored on my Snap Server (NAS) and try to
save it, I get an error message telling me that the file can't be
found. If I close it, the file on the server will be replaced by a
file with an arcane number code in place of the original name (such as
"0AC13000"), and the changes I made to the original will be gone.
I'm using Excel v. 11.1 (040909) and Tiger (10.4.2). *Strangely enough, it doesn't seem to happen when I log onto the server with a machine
running Panther.
Does Excel create a temp file when it opens that might be getting
"confused" as to where it is?

Almost exactly the same thing happens when I use PowerCadd, which leads me to believe it's not simply an Excel problem.