We have been under assault for over two years now by dedicated forum SPAMmers and a couple of persistent trolls.
One of our tools is to ban an IP address that is used by people that are not using this forum properly.
If you will PM me with your IP address, I'll look into who was using it and why we included it on our ban listing (if that is, indeed, what has happened). We might be willing to unblock it and observe how it is used in the future.
Apart from that, my apologies for the inconvenience.
Please don't send me PMs asking for immigration advice