[Plugin: FeedWordPress] error

Hi I am using Feedwordpress for my job board site now, but get the error when wanting to register on my site or login at the frontpage, this is my error:

Fatal error: Cannot redeclare username_exists() (previously declared in /usr/home/deb14172/domains/onlinemediajobs.nl/public_html/wp-includes/registration.php:16) in /usr/home/deb14172/domains/onlinemediajobs.nl/public_html/wp-includes/registration.php on line 22

Does anyone have any idea how I can solve this?

I’ve used wp-o-matic but that was even worse, it also disabled the ‘post a job’ functionality of the site.

Hope someone knows the answer, registration trough ‘post a job’ does work at the site, but hitting ‘register’ at the frontpage directly doesn’t work, so I think a solution (maybe easy) must be there somewhere… I am sure feedwordpress, which functionality is great off course, causes the problem.

Have a look at onlinemediajobs.nl, if you like to, to see it for yourself.

Hopefully someone knows the answer. At least thanks for reading by now.

M.