I installed a dimmer switch in a hallway.  Two switches, one on each end of the hall.  I replaced one switch with the dimmer.  The hall has two lights in the ceiling.  I replaced the two lights with two new led lights.  The instructions for the lights gave me several options for dimmer switches that could be used with those lights and I bought one of the recommended dimmers.  Before, I could turn the lights on/off at either switch.  Now, if I turn the lights off at one switch only that switch will turn the lights back on.  The dimmer is wired the same as the previous switch.  As it happens, I am using the same dimmer that you used in an instructional video about 3 years ago.  I’ve watched the video several times and I just can’t figure out what I have done wrong.    Any suggestions?