I have no idea what is wrong here. Since you cannot change the command mode of your remote, which is set to AV2, and your receiver has been changed to AV2 (are you sure?), they should "talk" to each other.
This is the procedure for changing your receiver, which you should check again.
1. Press Setup
2. Press Menu < or > to select the parameter
3. Press Menu + or - to select the setting
If this doesn't work, you should post your problem here, where the receiver and receiver remote experts are. [Link: agoraquest.com]