Windows 7 Home Basic Serial Strange network proble

[please70439]

Have an incredibly odd concern using a new vista home business home pc in network,Windows 7 Home Basic Serial
with Windows 2003 Server R2 SP2.
One of the many network drive maps H: incorporates doc/pix/xls and so on. I can entry the
network drive by means of Explorer and copy/delete/change name of files etc from the
Vista Desktop computer.
When I start off Word2007 and load a document in the network drive it's not
probable to "save" or "save as" on the network drive. Word make filename but
it is 0kb. If I take "save as" and store the change document on Vista
Personal pc desktop it truly is no concern. And the quite odd thing is that I later
can copy this file from Vista desktop into same place on network drive
without errors after closing Word. Same situation is on Excel files.
Nice if anyone have som suggestion. All Windows Updates are installed on
Vista and Office.
Thanks in advance.