It seems that you are having some issues with the SlingPlayer since the remote control does not work.
First of all, the Slinglinks setup has nothing to do in this specific situation since they allow the connection between the Slingbox and the router when they are in different rooms.
If the virtual remote control does not work, I recommend you to run the AV setup one more time and make sure to select the specific make and model of your set top box. The following article will allow you to determine if your set top box is included on the supported devices list:
If it is not included, I encourage you to check the following thread, provided by alanrichey42:
Hope this helps!