I have an android 5.1 phone, Slingbox 500, Chromecast and the Slingplayer app. I can connect to my Slingbox using my phone. I cannot cast from the phone to my Chromecast connected TV. The "cast button" does not appear anywhere in the Slingplayer app. I also have a Google Nexus 7 tablet and I can cast with that since the cast button appears on the installed Slingplayer app. Can someone help me with the problem I'm having trying to cast using the android phone? Thanks!