#5 installation error

[Mark Stokes]

When installing, I get:
Notice: Undefined index: mysql_prefix in
C:\WebShare\rootweb\phpticketplus\config.inc.php on
line 251

This also happens with v .71, .7, and .65 of base product.

My details:
mysql-5.0.24-win32
phpMyAdmin-2.8.2.2
php-5.1.5-Win32
Apache/2.0.50 20020903
Firefox/1.5.0.6