Losing connectivity to TV/Receiver

Hi folks. I am very new to all this. I am using XBMC on a Raspberry Pi running RASPBMC. I am very impressed with the performance I am getting.

However, I decided the leave the Raspberry Pi on all the time. When I finished watching shows I turn off the TV and the receiver. My Raspberry Pi connects through HDMI to the receiver which in turn connects to the TV using HDMI as well.

Later when I come back into the room and turn the TV and receiver back on, the communication with the Raspberry Pi has been broken and I don't see any image. I end up having to reboot the Raspberry Pi.

I have already added two statements in CONFIG.TXT that I read about in a thread. They are:

hdmi_force_hotplug=1
hdmi_drive=2

Can anyone give me some advice on how to handle this situation?

Thanks ............ Rob