Step 1: Remove unit from wall
Step 2: Throw unit in path of moving semi
Step 3: Replace unit with a name brand unit that works.
Sorry I can't be of more help but those units are notoriously crappy. Our friend has been through 6 of them durring the warranty period with his 5er.
Others here have replaced them with name brand units and are much happier. Have you tried the
manual.
The same link is available on the main page of the forum on the right sidebar.
Good luck...