There seems to be something up with your static IP. I have looked and looked for a solution to your issue and I can't find anything on TK's end that could be causing it. You're definitley not in any shitty group or anything like that and your IP is not included in any of the blacklist ranges.
Since I fixed the Nameserver issues that were plaguing the board during my tenure AND LONG BEFORE there have been no issues with the board for me or anyone else I have spoken to.
It might be worth phoning your ISP and asking them to assign you a new IP address or something like that. I will keep looking as always until then.