If you haven't already, double check your SPAM folder for the account activation email. If there is no email there, you can call Tek Support at 1 866 883 5411 and a member of the team can manually activate your account. During the week, our web team does periodically manually activate accounts they notice as inactivated as well.
Once you are able to log in, we recommend that you double-check your email address to make sure it is correct. We all make the occasional mstake when we type, and a mistyped email address could be the reason you didn't get your activation email initially.