This probably has nothing to do with the Slingbox. I would hazard a guess that if you plugged the leads into another TV instead of the Slingbox you wouldn't see them either. A lot of manufacturers do not output that sort of thing onto the secondary output as they assume you are using it to record programs and won't want anything else on the screen. If you are lucky it will be an option somewhere in the settings. If not you need to post this on a T-We forum.
I have bought a Slingbox M1, and the old remote from Sagem ITCD 83 250 HD works fine to use on my new T-We box (ADB 5743) from Canal Digital, Norway. Even if the remotecontrol looks different than my new one.
BUT the problem is that I cannot see the on-screen graphics for the box that comes up on my TV for menu, channel list, TV-guide a.s.o. on either my iPad, Slingbox Desktop app for OSX or by browser, even if I can see it on my TV at the same time... I am not talking about the TVs menus, but the set top box' on screen graphics. I can only see the TV-channels themselves.
Do anybody know why? Can this be solved in any way?