I've never used the cmmf=1, I've only used the default (PDU: mode 0) and it works without any probs. This does require a little extra code, but it's quite simple (packing the 7-bit characters).

I don't know which AT command guide you are looking at, but mine has completely different parameters to all the AT commands that you're sending.

I've attached the code I used to send SMSs, it's in BASIC so you'll have to convert it to C++ or I'll get kicked off this site.

hi;
i am already able to send sms by using hyper terminal. but now, i am going to add some code into to C++, so that the programe can send sms through hyper terminal. can anyone help me, pls. thanks

i need code for pc to mobile to send and recieve sms in c++

My work uses software like that can sent SMS from your computer. I think it is called Red Oxygen www.redoxygen.com but im not sure. I can send SMS from Outlook just like email. They also have an API code and it can be put into basically any program.
Hope this helps.