Operating system name and version: Ubuntu desktop 11
Version of smsd: smstools3-3.1.14.tar.gz
Smsd installed from: sources / package repository / from elsewhere...
Name and model of a modem / phone: WAVECOM WMOD2
Interface: serial

I run the following command to identify the port:
dmesg | grep ttyS
[ 0.00211] tty tty29: hash matches

[GSM1]

device = /dev/ttyS29
incoming = no
mode = new
rtscts = yes
baudrate = 9600
read_timeout = 5

SMSD.LOG

18/04/12,2, smsd: Smsd v3.1.14 started.

18/04/12,2, smsd: Running as root:root.

18/04/12,7, smsd: Running startup_check (shell): /var/spool/sms/incoming/smsd_script.1BcGme /tmp/smsd_data.XCbtwu

18/04/12,7, smsd: Done: startup_check (shell), execution time 0 sec., status: 0 (0)

18/04/12,4, smsd: File mode creation mask: 022 (0644, rw-r--r--).

18/04/12,4, smsd: Using international prefixes: notinuse

18/04/12,4, smsd: Mainspooler uses GSM1 to send administrative messages.

18/04/12,6, smsd: Using datetime format "%d/%m/%y". It produces "18/04/12".

18/04/12,6, smsd: Using logtime format "%d/%m/%y". It produces "18/04/12".

18/04/12,6, smsd: Using date_filename format "%d/%m/%y". It produces "18/04/12".

18/04/12,5, smsd: Outgoing file checker has started. PID: 1909.

18/04/12,5, GSM1: Modem handler 0 has started. PID: 1910. Will only send messages.

18/04/12,7, smsd: All PID's: 1909,1910
18/04/12,6, GSM1: Checking if modem is ready

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,5, smsd: Moved file /var/spool/sms/outgoing/send_KyeHfT to /var/spool/sms/checked

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> AT

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,7, GSM1: -> 

18/04/12,3, GSM1: write_to_modem: error 5: Input/output error

18/04/12,3, GSM1: Modem is not ready to answer commands (Timeouts: 0)

18/04/12,2, GSM1: Failed to initialize modem GSM1. Stopping.
18/04/12,2, GSM1: Modem handler 0 terminated. PID: 1910, was started
18/04/12.
18/04/12,2, smsd: Smsd mainprocess is awaiting the termination of all modem handlers. PID: 1909.
18/04/12,2, smsd: Smsd mainprocess terminated. PID 1909, was started


I dont understand this error you can help me.