vpnc password

Hi,

If I try to run vpnc with this configuration file:

IPSec gateway 131.220.242.5 #vpn.informatik.uni-bonn.de
IPSec ID aither
IPSec secret bobmetcalfe
Xauth username <VPN-Username>
Xauth password <VPN-Passwort>

With appropriate settings for password and user name, I'm still being
asked for the password interactively:

[root@aldeberan vpnc]# /usr/sbin/vpnc
Password for VPN <VPN-Username>@131.220.242.5:

How can I force vpnc to use my (plain text) password in the file?

Additioanl info:
[root@aldeberan vpnc]# /usr/sbin/vpnc --version
vpnc version 0.4.0
Copyright (C) 2002-2006 Geoffrey Keating, Maurice Massar, others
vpnc comes with NO WARRANTY, to the extent permitted by law.
You may redistribute copies of vpnc under the terms of the GNU General
Public License. For more information about these matters, see the files
named COPYING.

Supported DH-Groups: nopfs dh1 dh2 dh5
Supported Hash-Methods: md5 sha1
Supported Encryptions: null des 3des aes128 aes192 aes256
Supported Auth-Methods: psk psk+xauth

[root@aldeberan vpnc]# uname -a
Linux aldeberan 2.6.22.9-91.fc7 #1 SMP Thu Sep 27 23:10:59 EDT 2007 i686
i686 i386 GNU/Linux


Regards,

Norbert