I just got the comcast Pace PX013ANM DVR and have a slingbox M1. With only the Composite (Yellow, Red and White) cables hooked up, i'm not seeing any video. I can hear the audio just fine. From the TV to the DVR there is a HDMI cable. Then from the DVR to the slingbox it is only the composite cables (since there isn't a component cable output). Do I just need to upgrade to a slingbox with HDMI? Or is there a way to make the M1 work with this. Thank you!