Network drive disconnecting

In our organization, I've set up Mapped drives for each OU via GPO. One of the drives seems to time out or something and it only happens on one mapped drive. none of the others are affected.  If I open a File exlporer and select that mapped drive after a while (i don't know the timeframe) the file explorer closes. If they have a doc open from that drive it generates an error that the drive is invalid or something like that.
All the drives are set up exactly the same way.
ronfastI.T. DirectorAsked:
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Bill BachConnect With a Mentor PresidentCommented:
Windows can drop a mapped drive when it feels like it.  You can customize some of this, as discussed in this Microsoft KB article:
This page has a MrFixIt download for the problem, describes the registry settings which can be changed (Create HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters\autodisconnect as a DWORD and give it a value of FFFFFFFF), and running net config (net config server /autodisconnect:number where number is 65535).
Is there anything about that Share than any of the others in use? Is it on a different Server to any of the others for instance?
ronfastI.T. DirectorAuthor Commented:
Same server as the others. There's nothing obviously different from teh other shares. I set them up the same as the others. Unless there is a setting someplace that i'm not aware of.
ronfastI.T. DirectorAuthor Commented:
If i map another drive to the same share using a different drive letter the same thing happens.
Jackie ManCommented:
Are all map drives using the same credential?
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