I have now managed to migrate my website

Hi Guys.

I have now managed to migrate my website http://www.dermotmurphy.com from Dreamhost to wpengine. Only one problem remains.

I migrated the site to wpengine as dmphoto.wpengine.com and when I type http://www.dermotmurphy.com into the address bar it resolves tp the wpengine content. ONLY prblem is the url in the address abr changes from http://www.dermotmurphy.com to dmphoto.wpending.com and I obviosuly dont wnat that I want it to still say http://www.dermotmurphy.com

What do I need to do to fix this?

Thanks in advance.

Dermot