Win2003 IPSec VPN Keeps Stopping and Not working

Hi,
We set up a VPN from a win2003 box to a sonicwall pro 300. We used the security policy to set up IPSec. This works great, but very often -- usually in middle of the night each night, it loses connectivity and stops working. When we unassign/reassign the policy it all goes back to normal. Is there any reason for this or any way to fix this and prevent it from happening?
morudaAsked:
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jabiiiConnect With a Mentor Commented:
your VPN tunnel's have a set time that they will stay open for. they will not try to reform automatically unless you tell them. This is probably what's happening.
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cisco_2k2Commented:
What do your logs show during the time frame in question? Also, what version of firmware is on your sonicwall?
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morudaAuthor Commented:
windows logs show nothing---
sonicwall is version 6.5.0.4
i can dig through sonicwall logs, but what am i looking for? it seems to be negotiating a connection every couple of minutes--- so there is a lot of data to search through
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morudaAuthor Commented:
where is this setting in windows--as the setting is not on the sonicwall.
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