Visual basic 2013 soru

 Private Sub Timer2_Tick(sender As Object, e As EventArgs) Handles Timer2.Tick
        kont = inifile.Getir("Oto", "kullanici", TextBox2.Text) 'String
        If kont.Length > 1 Then
            kont2 = True
            kull = inifile.Getir("Oto", "kullanici", TextBox2.Text) 'String
            sifre = inifile.Getir("Oto", "sifre", TextBox3.Text) 'String
        Else
            kont2 = False
        End If
    End Sub

An unhandled exception of type 'System.InvalidCastException' occurred in Microsoft.VisualBasic.dll

Additional information: Conversion from string "musvik22" to type 'Long' is not valid.

  Dim inifile As IniFiles = New IniFiles("C:\Users\AYŞEGÜL\Desktop\wolfteam jserv\Ayarlar\Ayarlar.ini")
    Dim oto As Boolean = False
    Dim sek As Boolean = False
    Dim uzanti As String
    Dim kont As String
    Dim kont2 As Boolean = False
    Dim kull As Long
    Dim sifre As Long