Welcome to the forums!

What is the exact error you get? Is it displayed on a blank page or is it a part of b2evolution? Can you give a link to that page?

This is the link to the page I go to when on the link blog tryng to write a new post.
http://www.americanmuslimah.com/blog/admin.php?ctrl=items&action=new&blog=3

http://www.americanmuslimah.com/blog/blog3.php