1.First go into menu on your dvr.
2.Next go to System Setup.
3.Next go to System then Control Device and change number of id so it is different from other dvrs.
4.Next hold down ID button on the remote control.
5.Change the number to the dvr you want to use and then put the return button.
6.Now you should be able to control the dvr.
7.To change to another dvr repeat steps 4-6.