I thought so also, but if you have a straight 4000E, the AlphaNumeric display and keypad is quite different from the Enhanced model. It will say either 4000E or 4000 Enhanced, with the keypad being irregularly shaped on the Enhanced, along with big arrow keys.
If you have the E model and get this to work, let me know!
( I must admit, I really want to step up to a Tech2, but the 4400 dollar price tag has me quivering! )