High Failure Rate

dear all

I am using kannel to send sms to  our subscribers through the telecom
company , the problem is i have 200,00 subscriber but the success  rate
between 25k and 30k which is very small number , i looked into the logs
file but   could not figure out what i am missing , is the configuration
,or the kannel ,or it is the sms center , does the network infrastructure
also play role in this .

i really appropriate any one point me where to start looking to solve the
problem


Attached is my kannel configuration

group = core
admin-port = 13000
smsbox-port = 13001
admin-password = mavas
status-password = mavas
sms-combine-concatenated-mo = true
log-file = "/usr/local/gateway/mavas.log"
#log-level = 0
box-deny-ip = "*.*.*.*"
box-allow-ip = "127.0.0.1"
dlr-storage = spool
dlr-spool =/var/spool/kannel/dlr
#unified-prefix = "+358,00358,0;+,00"
access-log = "/usr/local/gateway/access.log"
store-type = spool
store-location=/var/spool/kannel/store

#---------------------------------------------
# SMSC CONNECTIONS
group = smsc
smsc = smpp
smsc-id = "mavastel"
host = *.*.*.*
port = *****
transceiver-mode =true
#receive-port = 8313
smsc-username = "00000"
smsc-password = "0000000"
system-type = "SMPP"
throughput = 30
#reconnect-delay = 60
allowed-smsc-id= "mavastel"
preferred-smsc-id ="mavastel"
log-file = "/usr/local/gateway/mavastel.log"
#address-range = ""




#---------------------------------------------
# SMSBOX

group = smsbox
bearerbox-host = 127.0.0.1
sendsms-port = 13013
#global-sender = 8208
mo-recode=true
#sendsms-chars = "0123456789 +-"
log-file = "/usr/local/gateway/smsbox.log"
#log-level = 0
access-log = "/usr/local/gateway/access1.log"

#---------------------------------------------
# SEND-SMS USERS
group = sendsms-user
username = mavas
password = tdPwD
max-messages = 10
concatenation= true
default-smsc = none


#---------------------------------------------
# SERVICES
group = sms-service
keyword = default
get-url = "
http://localhost/vms/getsms.php?sender=%p&to=%P&k=%k&d=%d&t=%t&q=%q&a=%a&smsc=%i&msg=%I
"
max-messages = 3
concatenation = true
omit-empty = true