Cat5E wall plate wiring: Uaed th ediagram that came with thje wall plate. It doesn’t work. Any suggestions? Turns the switch port light off

I ran a CAT5E cable from a functioning switch port and cut one end off and installed a wall plate, using the wiring color code per the chart with the wall plate. When connecting to a computer via a patch cable to the wall plate,
the switch port light goes out. The switch port was tested by using a patch cable directly to a computer and it works fine. The wall plate is the type with screw down connections on the back. Any suggestions as to why this doesn’t work?