Operating system name and version: Debian 6.0
Version of smsd: 3.1.11-1
Smsd installed from: Debian Squeeze package repository
Name and model of a modem / phone: gsm modem IIS (http://www.iisa.com.ar/)
Interface: serial

Dear, when I send a SMS with the command "/usr/share/doc/smstools/examples/scripts/sendsms" to another cell phone number, I fail and I get this error:

To: 1154763939
Modem: GSM1
IMSI: 722070310476877
Fail_reason: +CMS ERROR: 21 (Short message transfer rejected)
Failed: 12-10-23 16:19:57
PDU: 0011000A9111456783830000FF067079BD2C0E03

What may be the error reason ???

Thanks a lot

Alejandritox :P