WSUS SP1 CLient not checking in with server

Have WSUS SP1 Running. My client are not checking in. The are all connected on the same LAN as the WSUS Server no connection issues. I have The GPO to Chect for updates every hour but they have gone4 day without checking in??? Any thoughts?
RobertsExchange2003Asked:
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trippleO7Commented:
There's a few different things to check initailly.  Is it all your clients, or just a few?

1)  In GPO are you pointing to the WSUS server?  e.g. http://servername, https://servername, or http://servername:8530 depending on how you set up your WSUS server.

2)  Make sure your GPO is configured for "Computer Configuration" and that those affected workstations are in that OU where the GPO is being applied.

3)  Were those clients imaged machines using ghost, altiris, acronis, etc?  If ss and you didn't sysprep them, you may need to create a new SID.  See NewSID:  http://www.microsoft.com/technet/sysinternals/Security/NewSid.mspx

Usually if none of your clients are checking in, it's #1 above.  Make sure if you used a different port, you specify that in your GPO.

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RobertsExchange2003Author Commented:
No the PC are not ghosted - I have the GPO setup for option 4  - check for updates every hour - applied to the correct OU (for 5 days) THe GPO is pointing to the WSUS server (installed WSUS on port 80). THey will connect at forst and then just stop checking in??? Couls it be windows firewall?
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