Missing messages?

Greetings Anton and fellow playsms users. Once again I sent out an emergency sms text message to our entire phonebook using #STD and #ADM and once again many of our users did NOT receive the message. I looked at playsmslog and did not find the missing numbers. Why is it not sending to all of our numbers. It is not sending to all numbers in the phonebook. I am using playSMS-1.4-beta3.tar. Messages to my users are not being delivered. I have two phones. One received the message, the other did not receive the message. Many of my coworkers also reported that they did NOT receive the message. Anton, please help. My phonebook has 3096 phone numbers. I am using Nexmo.