Can't load a website in Windows 7, but can in XP

I'm trying to load a .mil website.  I've tried several windows 7 boxes at our facility and none of them can access the site, all you get is:  IE (internet explorer cannot display the webpage)  Chrome (Error 107 (net::ERR_SSL_PROTOCOL_ERROR): SSL protocol error).  If I move over to a box that is using win XP, the site loads just fine.
MERC-CSAsked:
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MERC-CSAuthor Commented:
It appears that the combination of Windows 7 and Internet explorer 9 is splitting the traffic between two of our firewalls. We use DHCP for IP addresses. One firewall was cleared with the .mil site and the other wasn't..  Since it was splitting, the .mil site was bouncing us.  We put a static gateway in the ip configuration of the computers and that solved the problem.  
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Dave BaldwinFixer of ProblemsCommented:
It could be that you don't have the 'root certificates' on the Win7 computer but you do on the XP.  This page tells about it and has a link to the page to get them: http://www.dtic.mil/dtic/announcements/dodrootcertificates.html
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MERC-CSAuthor Commented:
A. Tried that and it didn't work
B. Users of these computers can log on to some .mil sites, and not others.

and yes, I have checked the site to make sure it is working...
simultaneously you can pull it up on an xp machine and not on a 7 machine.
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Dave BaldwinFixer of ProblemsCommented:
Then you should click on the security icons in XP to see what security protocol it is using.  There are more than one.  And there is the issue of root certificates although in Windows 7 I believe those are supposed to be automatically updated.  Are there any details to the error messages?  And can you give us a specific site that doesn't work?  I found several 'mil' sites that gave me certificate errors in Firefox on Windows XP which is why I found the certificate site.
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Gerwin Jansen, EE MVETopic Advisor Commented:
Possibly the .mil's site certificate has expired or is invalid. Did you try Firefox on W7?  FF should at least give you a warning message and letting you choose to temporarily trust the (expired/invalid) certificate. Not really recommended of course but at least you can view the site.
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Gerwin Jansen, EE MVETopic Advisor Commented:
Nice thing to have 2 firewalls, good to hear you solved the issue, I would not have thought in that direction.
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Dave BaldwinFixer of ProblemsCommented:
I would not have thought of that either.
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MERC-CSAuthor Commented:
this worked
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