Incorrect,

The 2000 will learn the codes. Unfortunatly the 50ES sends a string of multiple codes when you switch components for example. To learn these commands, you need to be a little sneaky:

Press and the Vol and Channel up buttons when the 2000 is off, and press the function key of your choise. As described int he manual, this allows it to "learn" a code to send when the button is first pressed - to switch AV inputs, for example.

On the 50ES rmote, tap the function (CD, DVD etc) and then blobk the IR port after around half a second or less. This wayyou only "catch" the first code it transmits - the code to switch the receiver input.

Worked like a charm for me.