Copy/open file from Unix through Samba problem

[Tse, Sam]

Dear all,

We are using Samba 2.0.2 on DG/UX r4.2mu03. One of the users is experiencing
a weir problem to copy files from the Unix share to local c drive. He copied
the file ok first time. After he changed the file on Unix, when he tried to
copy the updated file, he got the old file, even after he closed Explorer
and open again. 

Another user has a similar problem. He opened a file on the Unix share using
Excel and closed it. After he modified the file on Unix, when he opened it
from Excel again, he still got the old file.

Somehow the old file is being cached somewhere?

Anybody has idea about this?

thanks
Sam