Fatal error w/plugin

Hi all,

My blog was working fine until I changed my blog theme this morning. I am getting a fatal error (I am guessing that this is due to the theme change), but cannot get into the blog admin panel to change the theme back to the original.

http://www.swansboro-real-estate-blog.swansboroncrealestate.com/

The error message, in part, says:
“Cannot redeclare adsense_deluxe_insert_ads() (previously declared”

any help would be greatly appreciated! WordPress rocks!