Are you using a shared IP (i.e. a campus based one, which used with many other people)?
No. I have an individual IP in my room (the one that was "suspended" first). Afterwards I tried sending said PM from one of the computers at our uni library (which have different IPs obviously since I was able to get through to the forums) and I am not able to access the forums from any of the computers anymore (since they use the same IP of course). I am now posting from a computer pool in the uni, they have different IPs once more.
By the way, I could take a screenshot of the text I was trying to send, since I know how to replicate it. Maybe it can help you somehow? (But I doubt it honestly)
Also, what do you mean, you used a proxy? You're getting this error via proxy IPs too, not just your real one? It happens with more than one IP address??
Yes. That error is suspending every IP which I am logged in when executing the error.
What happens when you visit http://silenthillforum.com
when you're not logged in, and what happens when you are?
I can't even get through to the site. The browser is ceaselessly trying to load the page, but it doesn't show up. Doesn't matter if I am logged in or not. I deleted Firefox browser cache and cookies, but to no avail. As I said, it's obviously an IP problem.
Do you have an idea what the problem could be? Can you write an email to the server/hoster or something? I mean, this is not a normal behaviour...