This could happen because of various reasons, but before doing something else, first change the cable. It has been reported that if you change the cable, the device should recognize both the PC and the gaming device. In many cases, other users have tweaked the settings. This means you will have to access the Settings menu to configure the input and output modes. If you still have problems, then I recommend you to download the newest software for your device from the official website. The software is available for Windows and Mac.