rociologa

Hello, I`m trying to send SMS using a Multitech mutimodem GSM/GPRS MTCBA-G-EN-F4-ED. I have achieved to send SMS using Hyperterminal, but first of all I`ve had to introduced user/password. Once I send SMS using VISA and AT commands but it was with a another modem, a serial port modem Wavecom; now with ethernet, I have problems. Some ideas? Thanks in advance!