http://garminoregon.wikispaces.com/chirp#General%20Information-CP1.%29%20What%20is%20Garmin%20chirp?
I had the same problem, and got help from the cacheowner. I had to update my 62s.Try the link above. By the way, I saved the Gpx-map on my external disk and then sent it back to the GPS after updating but it doesn`t open. I should have saved it in Base Camp acording to the instructions instead. You then switch the chirpfunction on and of in menu- inställning(I don´t know the english term, bedeutet einstellen)-geocaching-chirp on or off. Good luck!
