You do not want your receiver to control the Tivo, rather the other way around. Use the IR blaster which plugs into the back of a not-2-tuner Tivo and to the IR window of the receiver.
Original S1 (Recycle Heaven)
Series 2 (PLS, sold)
TiVo HD 1TB (157 HD Hrs, PLS, "652")
Juliet Basic (4XL, PLS)
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!