I have tried twice to contact GT administrators to change my log-in name, but am getting no response. Can you help me? Please E-mail me at firstname.lastname@example.org, and I will pass on the changes I would like to make. If you can't help, can you suggest who can help and how I can contact him/her. Thanks. P.S. I tried to re-register under a different name but the system won't let me.