SQL timeout error register.php
 

I have a problem with new users attempting to register. register.php is timing out on register.php?do=addmember. Maybe 1 out of 10 will be successful, but the other nine are not. Registration went from 50+/day to 5-10per day and my inbox is full of people who are not successful.

Any idea what I have done to screw this up? Maybe point me in the right direction?