Dreamhost not allowing Typepad domain mapping


I am frustrated. I have followed directions perfectly for domain mapping transfer for Dreamhost and Typepad and it’s not working.

My blog is at http://timandren.typepad.com and I want it to be displayed at http://blog.timandren.com. I originally wanted it at http://timandren.com but I understand that Dreamhost doesn’t allow for CNAME records unless it’s a sub-domain…not sure why.

Any help would be greatly appreciated.