Forms :: Compile Error - Variable Not Defined

I tried to create a form that recognizes two kind of users and when you log in it shows a different form, reading and seen videos I type something like this (code below) but when run in a click on a button it says....

Compile Error: Variable not defined: In this forum read that you must declare global variables on a Module, so I added this on a Modele Called Modeule1 but also doesnt work.

Option Compare Database
Option Explicit
Public strAdmin As String
Public strUsuar As String

Usuar and Admin are the form that will appear when login as a usuary or Administrator.

Option Compare Database
Option Explicit
Dim NumIntentos As Integer

[code]....