Ok, I replaced "undef" with "''"

It now looks like this... I'll show a little more code:

if (defined($in{new_aff}) && $in{new_aff} == 1) { # Checks to see if
        # they are adding our Affiliate Program to their registration
    if ($in{tax_id} ne "") { # Checks to see if they
        # added a tax id number for when we pay them
        $dbh->do (qq{ UPDATE reg_users SET tax_id = ? WHERE username =
+ ? },
                    '', $in{tax_id}, $username);
    }
        # Ok, these were required fields IF they checked the box which
+ made this
        # execute from above
    $dbh->do (qq{ UPDATE reg_users SET aff_url = ? WHERE username = ? 
+},
                '', $in{aff_url}, $username);
        # the one above added their Website for us to view
    $dbh->do (qq{ UPDATE reg_users SET aff = ?, aff_su_date = ? WHERE 
+username = ? },
                '', "yes", $formated_date, $username);
        # This one adds the affiliate program to the reg_users table. 
+it basically just
        # turns it 'on'
}
    $dbh->do (qq{ UPDATE reg_users SET html_email = ? WHERE username =
+ ? },
                '', $in{html_email}, $username);
        # this one just above was in a different part of the form, I j
+ust added it.
        # It asks them if they support HTML email for our eMail update
+s, they can
        # turn it off and on in the "registered users" manager I built
+.

    $dbh->disconnect();
        # Ok, now this finally disconnects.
[download]

It still does not work. It does not update these columns: html_email, tax_id and aff_url

The rest are updated (aff and aff_su_date)

Since those two get updated and the rest do not, I'm very lost. Like I said the $in{var} variables that are being called do have values. I don't know why MySQL is not updating them in the SQL syntax Perl is giving it.

Still lost.

Any other ideas?

Thx,
Richard.