I've been having this problem since I re-installed BYOND about five days ago. I looked around this section of the Forum, and haven't found anything really helpful.
What is happening is that, after logging into both the BYOND Website and the BYOND Pager, starting a game has me connect as a Guest. After reading through the forums, I saw that installing BYOND as an Administrator is supposed to help solve this. So, I did that (with version 495.1136) and tried again. No changes. I continued to look, and saw that BYOND needed to be in the allowed list for my Firewall. I added the entire BYOND folder as an exception, and attempted to connect once again. No changes.
Deciding to take the brute force route, I completely disabled my Firewall and went through the Control Panel to assure that no Firewalls or Antivirus of any kind were causing a problem. Again, no changes. Now, at this point, I decided to just try things. I opened every port on my Router temporarily and tried to log in once more. And yet again, no changes. I was logged in as a guest. At each of these steps, I tried three different games, and each one had the same result of making me a guest.
I'm running a Laptop with Windows 7, 640-bit. I don't have problems with any other game or program on my computer, with or without my Firewall and Antivirus being turned off and my ports forwarded.
Do any of you helpful folks have any ideas for me? I've run out, and I am running slightly short on patience as well.