kannel ACK wait

Hello!

Today kannel stops sending any messages to smsc. In the log file i saw:

2002-01-29 13:32:09 [7] INFO: emi2: closing idle connection.
2002-01-29 14:37:39 [9] DEBUG: boxc_receiver: sms received
2002-01-29 14:37:39 [7] DEBUG: clear_sent called
2002-01-29 14:38:39 [7] DEBUG: emi2 sending packet:
<35/00118/O/51/89021733070/206/////////////////3//2020434E
3D526967687446415820557365722F4F3D494D424D534B/////////////6C>
2002-01-29 14:38:39 [7] INFO: emi2: Main connection closed by SMSC
2002-01-29 14:38:39 [7] DEBUG: clear_sent called
2002-01-29 14:38:40 [7] ERROR: connect failed
2002-01-29 14:38:40 [7] ERROR: System error 111: Connection refused
2002-01-29 14:38:40 [7] ERROR: error connecting to server `212.44.140.34'
at port `5006'
2002-01-29 14:38:40 [7] ERROR: smsc_emi2: opening TCP connection to
212.44.140.34 failed
2002-01-29 14:38:40 [7] INFO: smsc_emi2: waiting for 1 minutes before
trying to connect again
2002-01-29 14:38:40 [8] DEBUG: sms_router: time to sleep
2002-01-29 14:38:40 [8] DEBUG: sms_router: list_len = 1
2002-01-29 14:38:40 [8] DEBUG: sms_router: time to sleep
2002-01-29 14:39:34 [9] DEBUG: boxc_receiver: sms received
2002-01-29 14:39:40 [8] DEBUG: sms_router: list_len = 2
2002-01-29 14:39:49 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:49 [7] DEBUG: clear_sent called
2002-01-29 14:39:49 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:49 [7] DEBUG: clear_sent called
2002-01-29 14:39:50 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:50 [7] DEBUG: clear_sent called
2002-01-29 14:39:51 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:51 [7] DEBUG: clear_sent called
2002-01-29 14:39:52 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:52 [7] DEBUG: clear_sent called
2002-01-29 14:39:53 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:53 [7] DEBUG: clear_sent called
2002-01-29 14:39:54 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:54 [7] DEBUG: clear_sent called
2002-01-29 14:39:54 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:54 [7] DEBUG: clear_sent called
2002-01-29 14:39:55 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:55 [7] DEBUG: clear_sent called
2002-01-29 14:39:59 [7] INFO: emi2: closing idle connection.
2002-01-29 14:39:59 [7] DEBUG: clear_sent called
[this messages are repeated until i restart kannel]

my smsc group in config looks like

group = smsc
smsc = emi2
smsc-id = MTS
port = 5006
host = xxx.xxx.xxx.xxx
connect-allow-ip = "xxx.xxx.xxx.xxx"
receive-port = 5006
denied-prefix = 206
#smsc-username =
#smsc-password =
flow-control = 1
idle-timeout = 70
throughput = 2

Is it possible to make ACK timeout for stop-and-wait?
Thank's a lot.

with best wishes
 German Aksenov
phone: (095)258-7258 ext. 7836