Thanks! Now the users_Registration.php form works fine with added new fields.
Now the next step;
The users_Registration form has all the new fields in place. So I need to insert new fields in the follwing forms also:
I do see each form has different server behavior attached to the fields
Is there any way I can update all the above forms,by simply modifying the users_registration form server behaviors. Do I need to validate these forms too?