Trouble Installing Prestashop on secondary domain

[powder]

I am having real trouble installing PS on a secondary domain (not a sub domain).

 

If I install on primary domain (richardthorpecreative.co.uk) everything works fine.

When I install on powderclothing.co.uk (which is hosted on richardthorpecreative.co.uk's hosting) things don't work as they should. Please see attached screen shots.

 

Not being a technical expert I am guessing Prestashop isn't talking to the database correctly.

 

After going through several things with my hosting provider the problem still isn't solved (I think the changed .htaccess file)

 

Any help would be greatly appreciated, thanks.