I am working on a system that has 8 LCD 8.5 inch screens they're thin clients running with one server I'm trying to use POE to run power and data. So I plug the ethernet into my Cisco 3560 POE switch attached to that is a Cisco RPS 300. Once I plug it into the POE injector on the back of the monitor. it turns up but when it starts to put something on the screen. It shuts right off and turns right back on over and over. What could be the problem?