asterisk users - Aug 2005 - Directed pickup troubles

I've tried the directed pickup like explained in
http://www.voip-info.org/wiki-PBX+Call+Pickup
but I've got no way doing it work. When I call the ringing phone it use
the second line of that phone

Group call pickup works perfectly.

Is there some special configuration to do to make it works?

Best regards,

?ric