Computer wont use domain network location

Hi guys,

I have recently built some new Windows 7 computers and joined them to our business domain with no issues, but a couple of these computers have been moved to a different physical office location (e.g. different subnet) they no longer connect using the original domain 'Network Location', instead creates it's own 'Public Network" connection.

Now these computers cannot connect to network services e.g. Exchange, network drives etc...

How can I re-establish the domain network connection???

Any help would be much appreciated.

Regards
Mathew.

The offices are connected by a managed WAN, the one in question uses a wireless broadband gateway.

All other computers at this site work fine, just the new Windows 7 machine. It is picking up DHCP correctly, but because it has dropped the 'domain' network location and picked up a "private' network location it will not allow any domain services. I have also tried changing it to 'work' network location with the same effects.

No, one is 192.168.2.xxx, the other is 192.168.12.xxx

We have many subnets over different office locations

255.255.255.0

It is on a managed WAN which would obviously have static routes set to direct such traffic.

We have no issues with Windows XP clients.

No, I cant ping the domain controller.

I'm currently investigating the link you sent me, regarding changing local sec policies on the affected computer.