I just looked at your profile and for "default thread subscription mode" you have "do not subscribe" selected. You need to change that to one of the other options, like instant email notification, in order to get email alerts.
To fix it, go to the
User Control Panel, then
Edit Options, scroll down to
Default Thread Subscription Mode and choose one of the options on the drop down menu on the right. If you have trouble fixing it, let me know and I can do it for you.
