I have a new M1 and I downloaded the newest version of slingplayer for windows (win7). The player software finds and connects to the slingbox, and looks like it is about to start playing, but does not. All the controls appear to work, the network indicator shows 5 MB/sec. No picture, no audio. The IR-blaster functions work from the application and I can control the cable box. After a few minutes I get error P-16. I have de-installed and re-installed, downloaded another copy and tried again, rebooted, turned off windows firewall, etc. Nothing helps. The M1 works fine with my android tablet and also works with a third-party app (slingfront) on my PC.