Issue in limit of sending message in chat

Hello,

I am in big trouble in nowjs please help me.

I implemented one-to-one chat module where I am sending message by calling server's distribute_message function on client side(mobile app). It is working fine till 15 text size limit.
But more than 15 textlength data not allowing me to send to server from client side(mobile app).

its urgent I need your help.
