sms_client - Cannot send sms with my GSM Modem
 

Hello
I Want to send a sms alert which use in nagios.
But, when i try to send sms from "sms_client", I got the error message.
Here is what was i do
host:/etc/sms # sms_client mynumber "Test"
And here is the error messages :
Dialing SMSC 0855xxxxxx...
WARNING: read() Timeout
WARNING: read() Timeout
ERROR: Timeout: searching for +<CR><LF>+ failed after 10 seconds
ERROR: MODEM: Setting Local echo Failed
Total Elapsed Time: 16 Seconds
and here is configuration in "sms_modem" file ;

[SIZE="3"][SIZE="2"][SIZE="1"]# --------------------------------------------------------------------
# SMS Modem Configuration file
# --------------------------------------------------------------------
{
# ------------------------------------------------------------

MDM_lock_dir = "/var/lock" # Lock directory
# MDM_device = "modem" # Modem Device Name
# MDM_device = "ttyS0"
# Modem Device Name Examples:
#
# MDM_device = "term/00m" # UNIXWARE
MDM_device = "ttyS0" # Linux COM1
# MDM_device = "ttyS1" # Linux COM2
#
# MDM_device = "cua/a" # SOLARIS
# MDM_lock_platform = "SOLARIS" # Set this so that we generate
# Solaris compatible lock file
# names
# ------------------------------------------------------------
# MDM_pause_after_connect = 3000000# Pause after the connection
# string for 3 seconds
# MDM_pause_on_DELAYED = 60 # Pause when dial fails with
# DELAYED condition, in secs.
# ------------------------------------------------------------

MDM_command_prefix = "AT"
# MDM_init_command = "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0"
MDM_init_command = "Z"
MDM_dial_command = "DT" # Default unmark
MDM_number_prefix = "" # Number to dial to get an
# external line.

MDM_set_local_echo_off = "E0"
MDM_disable_echo_test = NO # Test and Set local echo
# YES/NO
# ------------------------------------------------------------
MDM_dtr_hangup_sleep = 3000000 # How many microseconds should
MDM_dtr_init_sleep = 1000000 # I lower DTR during
# init/hangup
# MDM_max_rings = 7 # default = 4
# ------------------------------------------------------------
MDM_command_suffix = "\r"
MDM_response_prefix = "\r\n"
MDM_response_suffix = "\r\n"
# ------------------------------------------------------------
MDM_flow_control = "Hardware" # Software or Hardware
# ------------------------------------------------------------
MDM_hangup_command = "H" # Default unmark
# MDM_hangup_command = "H0"
# MDM_attention_command = "+++"
MDM_soft_hangup_retries = 0 # Number of times I should
# continue sending hangup code
# If 0 then don't bother
# and rely on lowering DTR
MDM_guard_time = 1750000 # Microsecond delay before and
# After transmitting
# attention command
MDM_esc_time = 125000 # Microsecond delay between each
# character of the attention command

# ------------------------------------------------------------

MDM_lock_action = "BLOCK"
MDM_lock_retry_delay = 5000000 # Microsecond delay to wait before
# retrying for modem lock.
}

# --------------------------------------------------------------------

I use Wavecom Fastrack wm20392 as my GSM Modem with serial cable connectivity.
Can someone help me solving this problem ?