SMSC Connection

Hi,

I use the following configuration file with kannel 1.1.6 :

---------------------------------------------
group = core
admin-port = 13003
smsbox-port = 13013
admin-password = [ password ]
log-file = "/var/log/kannel/1133.log"
log-level = 5
access-log=/var/log/kannel/access1133.log
box-allow-ip = "127.0.0.1"
admin-allow-ip = "127.0.0.1"


# SMSC EMI
group = smsc
smsc = emi2
smsc-id = 1133
host = [ the ip ]]
port = [ the port ]
our-port = [ port ]
receive-port = [ port ]
flow-control = 1

group = smsbox
bearerbox-host = localhost
#user-allow-ip = "127.0.0.1"
sendsms-port = 31133
global-sender = 1133
access-log = "/var/log/kannel/smsbox1133.log"

group = sms-service
name = 1133
keyword = default
catch-all = true
max-messages = 0
omit-empty = true
send-sender = true
post-url =
"http://127.0.0.1:80/rcv.php?opid=2&service=%i&sender=%p&udh=%u&text=%a"
accept-x-kannel-headers = true

group = sendsms-user
username = [ username ]
password = [ password ]

------------------------------------------------

The SMSC I connect with does not have implemented the module for
authentication with username and password.
My problem is that the SMSC disconnects me if i don't send messages for
a half an hour.  When I get the status via http, 
bearerbox responds  that connection is "online". netstat reports also an
"ESTABLISHED"  connection with SMSC, so I don't
 even know if I can receive messages.

How can I solve this problem?

Felly