asterisk users - Sep 2006 - pickupgroup 1

I have problems with pickupgroup. While 621 can pickup a call to 601 
with *8, no phone can pickup a call to 621. Below are the settings for 
two phones. 601 is static in the sip.conf, while 621 is in the Real-time 
database. What could be the problem?

I have an extension 601:

[601]
type=friend
context=ELMIT
username=hotline
secret=shhshh
canreinvite=no
host=dynamic
;defaultip=61.220.121.19
dtmfmode=rfc2833
mailbox=601@office
nat=yes
callgroup=1
pickupgroup=1
callerid="Ronald Hotline",<601>
qualify=1000

and and extension 621:

CREATE TABLE `sip_buddies` (
  `id` int(11) NOT NULL auto_increment,
  `name` varchar(80) NOT NULL default '',
  `accountcode` varchar(20) default NULL,
  `amaflags` varchar(13) default NULL,
  `callgroup` varchar(30) default NULL,
  `callerid` varchar(80) default NULL,
  `restrictcid` char(3) default 'NO',
  `canreinvite` char(3) default 'yes',
  `context` varchar(80) default NULL,
  `defaultip` varchar(15) default NULL,
  `dtmfmode` varchar(7) default NULL,
  `fromuser` varchar(80) default NULL,
  `fromdomain` varchar(80) default NULL,
  `host` varchar(31) NOT NULL default '',
  `incominglimit` int(2) default NULL,
  `outgoinglimit` int(2) default NULL,
  `insecure` varchar(4) default NULL,
  `language` char(2) default NULL,
  `mailbox` varchar(50) default NULL,
  `md5secret` varchar(80) default NULL,
  `nat` varchar(5) NOT NULL default 'yes',
  `permit` varchar(95) default NULL,
  `deny` varchar(95) default NULL,
  `mask` varchar(95) default NULL,
  `pickupgroup` varchar(10) default NULL,
  `port` varchar(5) NOT NULL default '',
  `qualify` varchar(4) default NULL,
  `rtptimeout` char(3) default NULL,
  `rtpholdtimeout` char(3) default NULL,
  `secret` varchar(80) default NULL,
  `type` varchar(6) NOT NULL default 'friend',
  `username` varchar(80) NOT NULL default '',
  `disallow` varchar(100) default 'all',
  `allow` varchar(100) default 'g729;ilbc;gsm;ulaw;alaw',
  `musiconhold` varchar(100) default NULL,
  `regseconds` int(11) NOT NULL default '0',
  `ipaddr` varchar(15) NOT NULL default '',
  `regexten` varchar(80) NOT NULL default '',
  `cancallforward` char(3) default 'yes',
  `fullcontact` varchar(80) default NULL,
  `setvar` varchar(100) NOT NULL default '',
  PRIMARY KEY  (`id`),
  UNIQUE KEY `name` (`name`),
  KEY `name_2` (`name`)
) TYPE=MyISAM ROW_FORMAT=DYNAMIC AUTO_INCREMENT=102 ;

-- 
-- Dumping data for table `sip_buddies`
-- 

INSERT INTO `sip_buddies` VALUES (1, '621', NULL, NULL, NULL,
'"Ronald
private",<621>', '', 'no', 'ELMIT', NULL,
'rfc2833', NULL, NULL,
'dynamic', NULL, NULL, NULL, 'en', '621@office', NULL,
'yes', NULL,
NULL, NULL, '1', '5060', '1000', NULL, NULL,
'shhshh', 'friend', '621',
'all', 'ulaw;alaw;g729;gsm', NULL, 1158361126,
'192.168.250.76', '',
'yes', 'sip:621@192.168.250.76:5060', '');