check your other post about the URL for info. I wonder if that's the main problem, also dn't forget your CHMOD permission for the file if your on UNIX, NT well sorry can't help but you might need to check those too. Yeah, I know that sounds so beginner like, actually, I'm having troubles with a different script becuase I can't get the right variation of chomds to work. minor details, yuck!
just in case I'll post my deafult.cfg permisson setup:
$auth_no_authentication = 0;
$auth_time = 1200; # (20 minutes)
$auth_logging = 1;
$auth_allow_default = 1;
@auth_default_permissions = (1,1,1.1,0);
$auth_signup = 0;
@auth_signup_permissions = (1,0,0,0.0);
$auth_modify_own = 1;
$auth_view_own = 1;
$auth_user_field = 11;
My auth_user_field is 11 because that's were I've moved it too, I should've left it alone but I changed alot of the rec variables. this setup is pretty vanilla.
good luck