Members joining causes site to break

I have installed the software - it works fine - I can go in and deal with the admin section and do all that fun stuff. But when I sign up a member teh entire front page breaks with this error:

Warning: Division by zero in /home/betting/public_html/templates/base/scripts/BxBaseIndex.php on line 424

Does anyone have any suggestions on how I may fix this?
I really appreciate the help.

remove the members block in admin/builder/pages builder temporarily and see

I have the same problem if I deactivate the member it works but when active I get a database problem

In the email sent, plz find a part that says  "MYSQL ERROR: you have a ....."   in the email you get.

division by zeros are bad checkboxes...off the top of my head...