configure GSM modem with Kannel system

Hi there,
Please let me know if you have some experience on installing a GSM modem
( Maestro modem 100 ) with Kannel system

Here is the error >>>

2004-07-19 16:40:42 [0] DEBUG: HTTP: Opening server at port 13000.
2004-07-19 16:40:42 [0] DEBUG: Started thread 1 (gwlib/fdset.c:poller)
2004-07-19 16:40:42 [0] DEBUG: Started thread 2
(gwlib/http.c:server_thread)
2004-07-19 16:40:42 [0] DEBUG: Started thread 3
(gw/bb_http.c:httpadmin_run)
2004-07-19 16:40:42 [0] DEBUG: starting smsbox connection module
2004-07-19 16:40:42 [0] DEBUG: Started thread 4
(gw/bb_boxc.c:smsboxc_run)
2004-07-19 16:40:42 [0] INFO: AT2[/dev/ttyS0]: configuration doesn't
show modemt                                           ype. will
autodetect
2004-07-19 16:40:42 [0] DEBUG: Started thread 5
(gw/smsc/smsc_at2.c:at2_device_t                                           hread)
2004-07-19 16:40:42 [0] DEBUG: Started thread 6
(gw/bb_smscconn.c:sms_router)
2004-07-19 16:40:42 [0] INFO: ----------------------------------------
2004-07-19 16:40:42 [0] INFO: Kannel bearerbox II version 1.3.1 starting
2004-07-19 16:40:42 [6] DEBUG: sms_router: time to sleep
2004-07-19 16:40:42 [0] INFO: MAIN: Start-up done, entering mainloop
2004-07-19 16:40:42 [0] DEBUG: AT2[/dev/ttyS0]: start called
2004-07-19 16:40:42 [6] DEBUG: sms_router: list_len = 0
2004-07-19 16:40:42 [5] DEBUG: AT2[/dev/ttyS0]: detecting modem type
2004-07-19 16:40:42 [5] INFO: AT2[/dev/ttyS0]: opening device
2004-07-19 16:40:42 [5] ERROR: AT2[/dev/ttyS0]: open failed! ERRNO=13
2004-07-19 16:40:42 [5] ERROR: System error 13: Permission denied
2004-07-19 16:40:42 [5] DEBUG: Thread 5
(gw/smsc/smsc_at2.c:at2_device_thread)
t                                           erminates.
2004-07-19 16:43:21 [0] WARNING: Killing signal received, shutting
down...
2004-07-19 16:43:21 [0] DEBUG: Shutting down Kannel...
2004-07-19 16:43:21 [0] DEBUG: shutting down smsc
2004-07-19 16:43:21 [0] DEBUG: AT2[/dev/ttyS0]: Shutting down SMSCConn,
slow
2004-07-19 16:43:21 [0] DEBUG: shutting down udp