Can't send SMS via Telnet (Cyrillics)

Hello!

I have strange problem with russians sms. I use native fsockopen script:

If i send 1-part SMS:

Action: smscommand
Command: gsm send sms 2 79321234567  "Привет test test test"

Thats  FINE. But if i send:

Action: smscommand
Command: gsm send sms 2 79321234567  "Привет test test test Привет test test test Привет test test test Привет test test test Привет test test test Привет test test test Привет test test test Привет test test test Привет test test test"

Response:

Asterisk Call Manager/1.1

Response: Success
Message: Authentication accepted

But the SMS does not come.