Nevermind - I see your member number in your sig line. I reset your eStore password and sent you a PM with it. You should be able to log on and change it to whatever you wish.
How very strange. When you clicked on the link, were you already logged into the forum? It will give you that error if you were not logged in for whatever reason.
It is obvious that you can log in because you are posting. There should be no reason why you are unable to access that page directly once logged in...
See if any of these work for you when you are logged in...