Saving page problem.

Hello everyone,

Since yesterday I have a problem with saving pages.
Once I click on the save button I got redirected to another page without saving my page.
The following is happening when I click save:

http://www.mysite.nl/wp-admin/post.php?post=8&action=edit -> http://www.mysite.nl/wp-admin/post.php -> http://www.mysite.nl/wp-admin/edit.php

The page I get redirected to is the page which views all the messages.
Can someone help me fix this problem?