I have a problem with my TV since I've bought it. When I connect a USB pendrive, than from 10 tries in 5 cases it produces this problem. In a red box it says: Cl Plus key Fail... . I'm not using any koax cable or cards, just using 2 HDMI-s(1 IPTV STB Cisco, 1 PS3). I'm using the latest firmware. I tried a few file system formats for the pendrive. Fat32,NTFS, but same problem. Any ideas would be helpful. Thx in advance!