Hi,
Sounds like autodisconnect, see Howto disable autodisconnect http://support.microsoft.com/default.aspx?scid=kb;en-us;297684&Product=win2000

>hi all,
>a customer is getting this error on his network. They are on a workgroup, all new pc's all patched, nic power saving stuff turned off. only 2 pc's are getting this error, the other 3 are not. seems to happen when they stop using the system for a few minutes ~5 and then use it again. I have deleted all of the cdx files and recreated them as he found a wiki posting saying that it is a corrupt cdx. I always thought that it was a network problem, any pointers?
>~M