How do you program the keyless entry for a 2001 Audi A6?

My keyless entry just randomly stopped working, I tried my alternate keyless entery and it will not work. I also have a Valet Key that I used just before my keyless entry stopped....could this have something to do with it?How do you program the keyless entry for a 2001 Audi A6?You need to get it to an Audi dealer they need to do a code read out to find fault.How do you program the keyless entry for a 2001 Audi A6?most have to be proffesionally programmedHow do you program the keyless entry for a 2001 Audi A6?with the valet in the door and master in the ignition in the "on" position try the buttons randomly, worked on a '98 A4.i had to reprogram after replcing the battery.