Mail merge in MS Word 97

[ton]

I use mail merge in word 97 (no service pack).
This mail merge use datasource from share server like \\serv1\share\test.xls.
It work fine until i change servername from \\serv1 to \\serv2.
When i open mail merge , it occure error that "Error! Not a valid filename.".

Everybody Please help me

Thanks in advance