I assume you didn't do a Forum search before posting ? There are dozens and dozens of posts about this. It's nothing to do with the Slingbox, Basically your TV provider has decided to implement HDCP to prevent you recording (& slinging) HD content. Just do what the instructions say. Dump the HDMI cable and feed the TV from the Component OUT plugs on the Slingbox.
As for the remote, check out this thread: https://community.sling.com/message/10363#10363