i have a sony RM-U306 that goes to a STR-K740P reciever. I had an old remote and i just bought a new one because i thought there was something wrong with my remote. so today when i got my new one. it didnt work either. so i downloaded the user manual to the reciever and it didnt tell me anything that could help me. the only thing that works on either of the remotes is when i push AV I/O and I/O (which turns it off). on the back of the remote it says if the buttons on the remote fail to operate check command modes of the reciever and the remote are the same (AV1 or AV2). im not sure what that means can someone help me?