Domain Mapping leading to main site


After my problems with BPS and HTACESS files yesterday I’m now having problems with Domain Mapping.

I’ve got the plugin installed correctly, (I’m pretty confident), and using sub directories.

The problem I’m having is that I’ve set the DNS A record to point at the dedicated IP address, set the domain in Tools/Domain Mapping in the sub install yet all that is happening, when I now network activate Domain Mapping is that the sub site automatically points to the main domain, not the sub site domain, with this not even letting me into the into the sub domain site dashboard, (it diverts direct to the main domain), so that I can check the settings.

Any suggestions please?