Connect Directv C51-700 Genie mini with Slingbox Pro HD - DirecTV

I need help getting a Directv C51-700 Genie mini to work with my Slingbox Pro HD. I do get picture and audio over the internet, but cannot get the virual remote control to work. Slingbox does not offer the C51, but the C41 is there and I believe would be close enough to at least work. I did change the remote function to IR mode on the Genie mini and tried the numerous Directv virtual remotes offered by Slingbox. I read that the Genie mini may not be at the default address, and that may cause my problem, but I do not know how to check that or how to change it. The hardware remote (RC73) works fine. Appreciate any help you can offer. Thanks. Bob

This question, "Connect Directv C51-700 Genie mini with Slingbox Pro HD," is about DirecTV channels, programming, equipment, and sports.