Nokia Premicell

Hi All,

I am configuring Nokia 30 GSM Modem with following Default Configuration:

group = smsc
smsc = at2
modemtype = premicell
device = /dev/ttyS0
pin = 0000
sms-center=+91xxxxxxxxxx
my-number = xxxxxxxxxx
speed=9600
keepalive=60


group = modems
id=premicell
name=m30
speed=9600

The kannel works fine for few messages and after that stop receiving any messages from
modem if we call on the number it will display RING message but for SMS messages it stops 
working after 10-15 messages without error message.

There is some configuration mistake. Please let me know how to configure the proper settings
so that the messages keep coming and respond by the Kannel.

Thanks in advance,
Rajkumar Farkiya