Error 403 When Posting

I’m starting to think this may be a problem resulting from my host but thought i would ask here first. I did a forum search but couldn’t find anything mirroring my problem.

Over the last day or so I have been unable to update my Word Press.

Eventually I got it to sort of work, but I can update with no more than a short paragraph. Any time I try to post or edit with more content I get an Error 403.

I am using a modified version of the connections theme and have been doing so for about the last year or so.

http://www.sucker-love.com/placebonews/