WordPress Blogs giving 505 error

Hi,

I have a wordpress blog. The problem I am having is this: Blogs that were not written by me are showing up in our Google Webmaster Tools as 505 errors. I don’t understand if our blog is linking to these other blogs somehow and I need to break that link?? I inherited this blog from a previous developer and it was broken when I started so I completely deleted all the files and re-installed. This did not fix the problem.