Thank you for your reply,
of course they all have unique data name, I use this data later on.
the problem is only with the number input field all the other fields working just fine if you not fill them they return an error as expected.
but if you not fill the number field is not return an error although I checked the required box.
I had the same problem,
in the plugin.class.php delete or comment out the function nm_login_empty()
