The problem is that the code gives the same response no matter what the problem is, whether it's anything from the user ID doesn't exist to a mistyped password (security thing to prevent brute-force attacks). However, I have verified your ID exists and is active with a direct SQL query to the database, and it looks in order.
So you tried a password reset? I could also try manually setting a password myself and emailing that to you.
The only other thing I can think of is to check that you don't have any rules in force in your browser that might prevent acceptance of certain cookies. Unlikely, I know, if you've tried several different browsers already, but it is the only thing I can think of at this point. Since your account looks okay, I can only speculate that it is having trouble establishing the persistent login session.
Any way you can try this from a different computer just to see what happens? Or a different IP address? It might help me narrow down what the problem is, because I want to know what's causing this.
EDIT: Also, what operating system are you doing this from?