excel 2010 one another

i have problem in working with 3 combos in excel.
combo 1 to drop down " Region"
combo 2 to drop down "Country'
combo 3 to drop down ' City'

Based on 'Region" selected in combo 1, combo 2 should list "country" in the "Region"
Based on "Country" selected in combo 2 combo 3 should list "City" in the "Country"
I have used "Named Ranges" and "RowSource" in VBA coding.
first 2 combos worked all right, but the 3 rd combo didn't.
attached the worksheet file
Please help me
**** Coding ****
Option Explicit
Private Sub ComboBox1_Change()
If Me.ComboBox1.Value = "Europe" Then Me.ComboBox2.RowSource = "Europe"
If Me.ComboBox1.Value = "Pacific" Then Me.ComboBox2.RowSource = "Pacific"
If Me.ComboBox1.Value = "Asia" Then Me.ComboBox2.RowSource = "Asia"
End Sub
Private Sub ComboBox2_Change()
If Me.ComboBox2.Value = "Gcity" Then Me.ComboBox3.RowSource = "Gcity"
If Me.ComboBox2.Value = "Fcity" Then Me.ComboBox3.RowSource = "Fcity"
If Me.ComboBox2.Value = "Acity" Then Me.ComboBox3.RowSource = "Acity"
If Me.ComboBox2.Value = "Jcity" Then Me.ComboBox3.RowSource = "Jcity'"
If Me.ComboBox2.Value = "Icity" Then Me.ComboBox3.RowSource = "Icity"
End Sub
Private Sub UserForm_Initialize()
Me.ComboBox1.RowSource = "Region"
End Sub
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