Domain mapping not working even after a clean install

I have totally re installed everything on my server. A clean install.

The only plugins added via the WPMU Dev Dashboard are.

1. Pro sites
2 Domain Mapping
3 advertising split plugin
4 ultimate branding
5 market press

My domain mapping is NOT working. I now have NONE of my clients site up. Please Do NOT give me any ridiculous responses and give me some real help.

I have added access on the dashboard screen and I can give access to server directly also.

PLEASE Help. I am in the process of refunding ALL of my clients again and consuming costs for hosting in the cloud that has already been giving.