Well, from what I've been able to investigate, it would appear likely they my security suite was too comprehensive and repeatedly conflicted with the servers particularly invasive identification protocol. I believe this may have lead to my IP being blocked. I'm not yet certain, as I have received no notification or warning of either the problem or the result. Maybe a mod will contact me.
Your IP isn't blocked and I'm not sure what your security suite could be doing that would cause this behavior.
Were you able to access the site with the suite disabled? What is the suite?