Turns out the we had to use the fix for the Cisco Pix firewall, we don't use Cisco, we use Sonicwall.
Had to run NetSh int ip reset, then reboot the server. Readd the correct IP infor and then run the reg hack.
As discussed over phone earlier , for conflict detection, the client computer uses the Address Resolution Protocol (ARP) request to determine whether the IP address
is being used. However, a ProxyArp device might incorrectly answer the ARP request, and an IP address conflict is reported.
When this problem occurs, the ProxyArp device responds to all ARP requests.
To work around this problem, we can turn off gratuitous ARP by setting the value of the ARPRetryCount registry entry to 0. To do this, follow these steps.
1. Click Start , type regedit in the Start Search box, and then press ENTER.
2. Locate the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
3. On the Edit menu, point to New , and then click DWORD Value .
4. Type ArpRetryCount .
5. Right-click the ArpRetryCount registry entry, and then click Modify .
6. In the Value data box, type 0 , and then click OK .
7. Exit Registry Editor.
(Reboot)
Since we don't use Cisco we didn't even try this fix. But it worked for us.
