on button click open textfile (from combobox1 choic - read url - goto url (relative path)

Hi all

Im trying to make a relative path for the function below. My purpose is ,, by pressing commandbutton 13,, to open a textfile with url inside and then make IE go to that url. The textfile to open is choosen from what you choose in the combobox1 list. I must be close to solve it ..or maybe far away? Please look at following code. Why wont it work? :

Private Sub CommandButton13_Click()
Dim IE As Object
Dim FF As Integer
 Dim filepath As String
 filepath = ActiveWorkbook.Path & "\data\url\" & ComboBox1.Value & ".txt"

     FF = FreeFile()

     Open "filepath" & ComboBox1.Value & ".txt" For Input As #FF
          Line Input #FF, StrUrl
     Close #FF

     Set IE = CreateObject("InternetExplorer.Application")
     IE.Visible = True
    
     IE.Navigate StrUrl
End Sub

Thanks in advance
/Jan