Issues with php5

Hi

I recently wanted to setup mailpress on my site (www.deeper-life.com) and so I have switched my hosting to php5.2. Now “…/wp-admin” and its related pages do not show (which all worked fine prior to the switch). Although the admin area of the site does not work the main viewable portion of the site does.

http://www.deeper-life.com – works fine
http://www.deeper-life.com/wp-admin – blank page

Can someone help please asap.

Thanks