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Sim300 & docomo card

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keets

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I am using SIM300 modem with Tata Docomo sim card for communication with PIC18F46K80 controller.
Everything is working nicely. Except SMS sent from modem are blank.If I replace docomo sim with vodafone sim , sms sent are correct. Messages received are correct in both the sim card.
What can be the problem?
Thanks in advance.
My AT commands sequence is as follows:
power on:- wait for 10 seconds:
AT
ATE0
AT+CMGF=1
AT+CLIP=1
for SMS:
AT+CMGS="+91XXXXXXXXXX"
upon receiving >
message terminated cntr z

- - - Updated - - -

One more thing I noticed that if I send the SMS to itself.The message received is correct when read by using AT+CMGR command.
 

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