Network disconnects when idle

is it red x? this may help quoted from
http://www25.brinkster.com/ChicagoTech
Why some mapped network drives show a red x

SYMPTOMS: You find that the network drive mapping may be disconnected after
15 minutes of inactivity and Windows Explorer may display a red "X" on the
icon of the mapped drive. However, if you double-click it reconnects
quickly.

RESOLUTION: by default, idle connections will be dropped after 15 minutes.
To modify idle time, at a command prompt using net config server
/autodisconnect: minutes. For example, to set the Autodisconnect value to
30 minutes, you would run the following command line: net config server
/autodisconnect:30. If you would like to turn Autodisconnect off, do net
config server /autodisconnect:-1.

For more and other information, go to
http://www25.brinkster.com/ChicagoTech

Don't send e-mail or reply to me except you need consulting services.
Posting on MS newsgroup will benefit all readers and you may get more help.

Robert Lin, MS-MVP, MCSE & CNE
Windows & Network Support, Tips and FAQs on
http://www25.brinkster.com/ChicagoTech
This posting is provided "AS IS" with no warranties.

"Tom" <tkirkpat1@comcast.net> wrote in message
news:0aa901c34223$b10d6700$a301280a@phx.gbl...

> I hafe a cable modem connected to a Netgear RT314
> router. Four computers are connected, with Win2000,
> WinME, and Win XP as operating systems. All worked fine
> until I upgraded one of the Win ME computers to XP. That
> computer now disconnects from the network / or my ISP
> whenever it has been idle for an hour or so. I thought
> it was my network card, Linsksys LNE100TX v4, which had
> no WinXP dirves, so I replaced the network card to a
> Linksys LNE100TX v5, with the WinXP drivers correctly
> installed. No improvement.
> The connections are restored if I reboot, but I would
> prefer not to have to do that.
> Any suggestions?