Syntax error in from clause access 2007

Hi,
I am recivind "syntax error in from clause" in my access database creating two cascading comboboxs thanks to Mr. alansidman! Here is what I have:

SQL:

SELECT DISTINCT MaintDBI.Dictionary
FROM MaintDBI
ORDER BY MaintDBI.Dictionary;

VBA:

Private Sub Dictionary_AfterUpdate()
On Error Resume Next
   Description.RowSource = "Select MaintDBI.Description " & _
            "FROM MaintDBI" & _
            "WHERE MaintDBI.Dictionary = '" & Dictionary.Value & "' " & _
            "ORDER BY MaintDBI.Description;"
End Sub

The "Dictionary" dropdown gives the proper results however when I select the "Description" Dropdown I recive the Syntax error.

Thanks,
Leslye