SBS 2008 & Windows 7 droping network connections

I have a client with SBS 2008 and all Windows 7 workstations, the problem I am having is that the network connections will go to sleep or become unavailable after an un-determined amount of time, usually 3-5 hours. This is causing MS Office programs like word to hang when opening or saving files. The quick fix so far is to have the users go to My Computer and open the drive maps manualy which brings them active again. This should be a simple issue but so far I have not spotted the solution.
C5MechAsked:
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NJComputerNetworksConnect With a Mentor Commented:
Also, check your network settings...

1) The Windows 2008 SBS server should be pointing to only itself for DNS in TCP/IP settings.
2) all clients should only be pointing to the SBS servers IP address for DNS in TCP/IP (not to ISP servers or any other DNS servers)

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NJComputerNetworksCommented:
turn off power save on the desktops.
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C5MechAuthor Commented:
Completly?
I have already turned all hibernate and sleep modes except for the HD and Monitor.

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NJComputerNetworksCommented:
Well maybe on at least one machine... to test the problem...
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C5MechAuthor Commented:
DNS is configured as per the checks listed above.
I will also turn off the Power Save on the person having the most issues with this, but it is happening on all workstations. I may not have any feed back until Monday to let you know if it is a power save option.

I have other clients using windows 7 and 2003 Standard server and there are no issues there, FYI

Thanks.
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C5MechAuthor Commented:
Ok, found the problem. All of the computers were set for fixed IP address due to accounting software requirements. All DNS was correct. Added the computers to a reservation list in the DHCP server and the drives have stopped dropping. Your help was appreciated on this. Thanks.
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C5MechAuthor Commented:
Comments by NJComputerNetworks lead me into the correct direction in trouble shooting.

Thanks.
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