DCS Certificate Common Name pointing to non-existing Server

Hi, We are running DCS:SA 6.6. It was running fine until a few weeks ago. The issue is when we log-in into the UMC. It shows the error below: "System Error: Unable to connect to DCS: Server. Ensure that you have accepted the DCS: Server certificate in the web browser. If the problem persists, contact service administrator."

We cannot connect using the assigned name as it does not exist. We can connect using the IP address, but then get the error above. The problem is that when we view the certificate, the "Issued to" name points to the name that does not exist. How to solve this issue?

Thanks in advanced,

MabundaG