Nokia 6310, Event 6 failed with return code 14

[Hans Locher]

When I try to read the calendar data with xgnokii, I get the error message
"Event 6 failed with return code 14".

I am using gnokii-0.4.2 in SuSE Linux 8.1. My ~/.gnokiirc is

------------------------------------
 [global]
port = /dev/ttyS0
model = 6310
initlength = default
connection = dlr3p
bindir = /usr/sbin/
use_locking = no
serial_baudrate = 19200

[connect_script]
TELEPHONE = 12345678
[disconnect_script]

[sms]
timeout = 10
-------------------------------------

Reading the adresses and sms seems to work.

Can somebody give me a hint, what that means or/and what I can do against it?
Thank You.
Hans Locher