Domain Mapping not working after I changed IP address


I've been using the Domain Mapping plugin successfully for the past year, however I just upgraded my server from a shared server to a VPS server and the hosting company provided me with a new IP address.

After updating the IP address on the Domain Mapping settings, all of the sites that were mapped before worked again fine, however 2 new sites I have which I need to map (after the change was done) it does not work. When I put the domain name on the domain text field and click "map domain" all I see is the loading image below the "health status" column and it never refreshes (it simply stays there forever)

> Please let me know if I needed to do something else when migrating but as mentioned past mapped domain work, only new ones don't work. Thanks