Message control using USB GSM modem

Message control using USB GSM modem

Hello,
After checking the sticky topic Modems that are tested by COPA-DATA for message-control I bought the Huawei E1550 – UMTS-Modem for sending messages. Accordingly the the mentioned topic, it should work, but I think I am doing something wrong.
This is what I have in Device Manager:
http://imgur.com/YfKvHJV
In Message Control/SMS Mesage, everything seems to be OK:
http://imgur.com/rVVss2H
But when I try to send a message, I get this errors in Diagnosis Viewer:
http://imgur.com/qzoM0HT
So, please tell me, what did I do wrong?
Thank you!

This is a migrated post! Originally posted on 01.09.2014 by user a.oprean. Please be aware that information can be outdated.