On the back of the unit will be a learn button, green, red or purple in color. Push it and then push the button the on remote, you should hear a click and see the lights flash once when it is programmed.

The other two buttons can be programmed to different openers operating on the same frequency. i.e if you had a three car garage, a three button remote could operate all the doors.

Is there a green LED on the wall switch? Is it blinking? If so, you may have inadvertently set the GDO into "vacation" or "lock" mode which essentially disables the remote. Lock mode is controlled by a small button on the wall switch with a small symbol of a lock next to it. Holding this button for several seconds will cause the LED to blink indicating "lock" mode is set. Hold it again for several seconds and the the LED is on steady and the remotes should work.

If this doesn't solve your problem try posting on the "Home Repair" forum. There are several opener repair professionals that post on there fairly regularly.

Oh, and those extra two buttons on the remote are for controlling a second garage opener and/or compatible wireless devices like wall switches etc. available at Sears.

My problem is a new remote opener, Chamberline Clicker Universal Remote, that will not operate the garage door. I have set the dip switches to the same settings as the old opener ( my unit does not have a smart learn button) which now will only function in close proximity the opener motor. The new remote opener will not activate the opener unit at all. close up or ouside the garage. I have tried resetting the codes by the dip swiches and even reversing the settings, to no avail. Any Ideas???