I just bought the Portta PET0301S 3x1 HDMI Switcher with 3D Support from amazon. I am attempting to use the switch with my fire tv and chromecast. Unfortunately, they will not work TOGETHER. If I use the switch with just the chromecast or just the fire tv, the both work. However, when I plug both in, the fire tv will work but not the chromecast. Chromecast will only display the starting flash screen but will not show any videos that are being cast. I attempted to use a 5V adapter with the switch. That did not help. And I don't know why using an adapter with the HDMI switch would help anyway since both chromecast and fire tv have their own power sources. And advice?