excel extensions

File pen dialogue box:
------------------------
Sub Get_Data()
FileToOpen = Application.GetOpenFilename _
(Title:="Please choose a file to import", _
FileFilter:="Excel Files *.xls (*.xls), *.* (*.*), *.xml (*.xml),")
''
If FileToOpen = False Then
MsgBox "No file specified.", vbExclamation, "Duh!!!"
Exit Sub
Else
Workbooks.Open Filename:=FileToOpen
End If
End Sub
----------------------------

The above code is working (except for the *.*) but I need to add the following extensions:
*.*, *.xlsx, *.xlsm

When I add them they do not appear in the open dialogue
All that appears at the moment are  the xls and xlm