SMS Send Failed (Data Format is not Valid)

[Alberto Medina]

Hi list,
I'm new in the list, I have a Little problem with Gnokii, when I'm sending SMS 
with it, after 3 or 4 messages the program return me the error in Subject (Data 
format is not valid), I can't understand why I can sent a couple of sms and 
later just cant sent anymore. I'm using a Sony Ericssson phone (K810i) and 
Debian Lenny. Here's my conf:

[global]

Port = /dev/ttyACM0
Model = AT-HW
Connection = serial
Serial_boutrate = 115200
Handshake = software

And this is part of the error I get:

Message received: 0x21 / 0x00ab
04 01 30 39 31 38 31 39 30 35 38 39 39 39 39 46 |   0918190589999F
39 31 31 30 30 30 42 39 31 38 31 39 30 38 38 37 | 911000B918190887
30 35 46 35 30 30 30 41 41 35 34 35 33 36 38 35 | 05F5000AA5453685
41 36 44 42 44 45 33 46 34 42 38 34 41 35 32 41 | A6DBDE3F4B84A52A
31 44 31 43 30 30 37 30 33 35 44 44 41 33 32 31 | 1D1C007035DDA321
42 34 38 44 44 33 46 30 33 37 30 38 32 41 37 44 | B48DD3F037082A7D
36 32 42 33 41 44 36 36 35 30 34 41 37 43 33 36 | 62B3AD66504A7C36
34 31 45 45 33 37 41 38 33 43 41 37 38 37 34 31 | 41EE37A83CA78741
46 32 46 32 31 43 46 45 37 36 39 33 44 33 36 35 | F2F21CFE7693D365
33 37 46 39 45 44 30 32 1a 0d 0a 2b 43 4d 53 20 | 37F9ED02   +CMS
45 52 52 4f 52 3a 20 33 30 34 0d                | ERROR: 304
Received message type 21
SMS Send failed (Data format is not valid.)
Serial device: closing device

Could you please help me with this?

Thank you in advanced,
Best Regards,
Alberto Medina