The IMS can communicate. Going through the set up procedure it has you check the limit functions by using the manual open and close buttons. But the buttons do nothing. THe warning label on the board as I mentioned early has be thrown. It says there is test software uploaded on the board and to be sure to load the necessary software. This is where I have searched every setting on the IMS and can't figure it out. With the board hooked up and power on the door will jerk open very hard about 4 inches and may do that a few times or then it may jerk close or alternate. This is all I can get the doors to do. After 10 secons or so of the jerking the door shuts down. Which it brings me back to the TEST software?? It sounds like other guys have been able to plug a new board in and they were good to go. This is the first TAC20 door board installation for me.