Can I program the remote door lock fob myself?

Why does my drivers door not lock when i press key fob ?? audi a4 2001?

• every other door locks .new battery fitted recently.could this be the problem ??. have tried re programming the fobs by putting the key in the ignition and turning until the lights come on lock door press 2 buttons on spare fob count to five waiting for a beep and flashing lights.but does not work . so annoying ,any ideas ??

• Answer:

  I have the same problem in my 02 Audi A4. The light also doesn't come on when you open the door either, correct? Actuator needs fixed, my Audi dealer estimated 7-800 repair bill. Have fun!!