Hi all,
I have this annoying problem. Mapped drive disconnect after period of inactivity; such as an hour or over night.

Windows XP: 4
Server: 1
Share folders are on the server and a single windows XP.

This is what I have done so far.
In command prompt: net config server /autodisconnect:-1

In regedit, change the autodisconnect hexadecimal vaule to ffffff.

Any help is greatly appreciated.

Could it be that the NIC is being turned off to conserve power? Try disabling power management on the NIC of both client and server and see what happens.

This article (http://www.scimag.com/ShowPR.aspx?PUBCODE=030&ACCT=3000000100&ISSUE=0601&RELTYPE=OL&PRODCODE=00000000&PRODLETT=J) also describes this issue and has some ideas that may help you.

Thank, I totally forgot about the NIC.

I will update the result next week.

Disable NIC power management does not resolve the issue.

Possible Cause: Network layer - loopback by NetBIOS
Server is used for AD, file/print sharing. IP is given out by router.
Server DNS take router DNS.