Access - Drop Down List Open Form

Please be gentle, i'm new to access but I'm trying to create a down down list that opens forms. I've done a fair bit of Google searches and not really found anything.

On my ComboBox on both "After Update" and "On Change" I have tried the below code.... Both with and without data in my drop down list.

Private Sub Combo1_AfterUpdate()

    Select Case Combo1.Value

        Case "Menu1"
            DoCmd.OpenForm "Form1"
        Case "Menu2"
            DoCmd.OpenForm "Form2"
        Case "Menu3"
            DoCmd.OpenForm "Form3"
End Sub

I have also tried;

DoCmd.OpenForm Combo1.Value

and adding my form names in the ComboBox but that doesn't work either.

Thanks in Advance.

.Lee