[FX.php List] Leading zero getting dropped in a login

[Jon Montgomery]

I have a login page where the user enters an id number.  Some of those id
numbers have leading zeros  such as 0427.  All of a sudden, when clicking
the login button the zero is dropped.  It has worked because several users
have entered information but now it is dropping the leading zero.

What can I do to fix this?

Jon Montgmery