Advice needed for webserver after MIAB install

To start with I had a webserver with and The domain are through Gandi. They were working fine. Since I have created a new server for MAIB and changed my settings on Gandi, my website are now not working. I think it is to do with the change of the Name Servers. But I am not sure what I need to do, to get the web sites working.

Many thanks in advance.

I have resolved this.

Custom DNS settings added for root and www