I have a Samsung HT-C450 Cinema system plugged into my Samsung SP56K TV. for the first 6 weeks the remote contols have worked independantly but for some reason the TV cinema system remote now works the TV only. I know you can set it up to do this but I did not enter the code to do so. The only way I can operate my cinema system is by the buttons on the front of the unit. I have tried unplugging everything and going through the set up but to no avail. Has anyone got any ideas?