[RESOLVED] Problem with disabling buttons in other forms

[Pantero]

To Pradeep:
I don't use "G" anywhere else in the application because i don't need to. Why would i need to use it anywhere else?

To bulldog:
Here is the code for my login screen:

Public Class frmLoginScreen
 
    Private Sub frmLoginScreen_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 
    End Sub
 
    Private Sub btnLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogin.Click
        'The purpose is to allow the user to login either as Guest or Admin
        If txtUsername.Text = "Admin" And txtPassword.Text = "4321" Then
            'Show main menu
            frmMainMenu.Show()
            'Hide this form
            Me.Hide()
        ElseIf txtUsername.Text = "Guest" And txtPassword.Text = "" Then
            'Show main menu
            frmMainMenu.Show()
            'Hide this form
            Me.Hide()
        Else : MessageBox.Show("Username or password incorrect. Please try again")
        End If
 
        Dim G As New frmUserDetails
        If txtUsername.Text = "Guest" Then
            G.btnDelete.Enabled = False
        End If
    End Sub
 
    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        'Quit the program
        Application.Exit()
    End Sub
End Class

and here is the main menu code:

Public Class frmMainMenu
 
    Private Sub btnLinkToUserDetails_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLinkToUserDetails.Click
        'Show User Details
        frmUserDetails.Show()
        'Hide the form
        Me.Hide()
    End Sub
 
    Private Sub btnLogoff_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogoff.Click
        MessageBox.Show("Are you sure you want to logoff", "Logoff now", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
        'Show Login Screen
        frmLoginScreen.Show()
        'Hide this form
        Me.Hide()
    End Sub
 
    Private Sub btnExitMainMenu_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExitMainMenu.Click
        'Quit the program
        Application.Exit()
    End Sub
 
    Private Sub frmMainMenu_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 
    End Sub
End Class

If you need any more code please ask, thanks for replying.