Radwho doesn't show full name

[mkeram]

Hello,
I have installed Debian Squeeze 6.0 with freeradius 2.1.10 + accel-ppp
(PPPoE). Everything is working fine, but radwho and radwho -s doesn't
return full username fetched from /etc/passwd. 
All users have real linux account and proper entry in
/etc/freeradius/users. All details login and passwords are included in
users file.
In old freeradius 1.1.3 I got radwho output:
zycha AnetaZych PPP S338 Sun 16:28 127.0.0.1 192.168.1.223 -where AnetaZych
is full name fetched from /etc/passwd

in new I have:
zycha zycha PPP S338 Sun 16:28 127.0.0.1 192.168.1.223

Could you please advice where should I change configuration? I have made
strace on radwho and I didn't find and information for checking file
/etc/passwd.

Please advice
Best regards
Marek