Cisco IP phone BLF button does not pickup call

Please refer to the Cisco prerequisites for call pickup: http://www.cisco.com/en/US/docs/voice_ip_comm/cucmbe/rel_notes/6_1_2/cucmbe-rel_note-612_2.html#wp308333 I my case there was an issue with the following: "The call pickup group for the monitoring user must contain the pickup group for the monitored destination, or call pickup will fail" Now when the reception and the user extension are in the same or in the inherited groups and it works ok.