Question : Windows 2003 Server Remote Sites not Replicating with main location

I have 2 A/D servers at my main location that replication is working on correctly.
I have 2 remote locations each with one AD DC (Windows 2003 Server).
Replication is not working between the main site and the remote sites.
The sites are connected VPN using Watchguard Fireboxes with wide open access.  
Please advise as to what I can provide you with to troubleshoot this issue and get it resolved.

Thanks!

Answer : Windows 2003 Server Remote Sites not Replicating with main location

DC is past the tombstone life which means it is dead and you must remove the DC.

Run dcpromo /forceremoval on DC.
Run metadata cleanup on HQ DCs http://www.petri.co.il/delete_failed_dcs_from_ad.htm
Delete all DNS records for the failed DC.

Once you have done the above you can dpromo the DC again.