Thank you for the information provided. I understand you are having difficulties trying to get HD quality on your SlingPlayer account using a HDMI-to-composite adapter. In order, for you to get High Definition on your SlingPlayer you would need a HDMI-to-component adapter. Below is a helpful link on how you can use and connect a HDMI-to-component adapter, so you can continue to get HD quality.
Slingbox.com - An HDMI-to-component adapter that you can use
Slingbox Moderation Team