Need help adding new codes to your Slingbox, this is the place to ask. You're welcome to ask general Slingbox questions here, but be aware that most of us are not Slingbox experts.
Well you must have made a mistake somewhere. If you took a working RMRDU file (C2015) and simply changed the Setup code to C1290 that CANNOT have affected the remote. That change of code simply switches the skin.
of course you were right! As Video source I didn't select "Cable Box" I selected "Other Controllable device". I changed this and now it works..
Thanks al!