Hi
The Nano site is completely separate from this one. Run by different people. We are very closely associated on the tech level though.
Your current IP address has been logged on one of the spam filters in the past and still remains. Hence the issue you are experiencing.
You have two options.
1. Restart your router to gain a new ip address, (they are usually assigned dynamically by your ISP) If it's a static IP then that will be of no help.
2. Message or email Trebor
member/Trebor/ He will set up an account for you.
Regards