How to disable Kannel's cach?.How to let Kannel transmit data at real time?

I want the wap gateway transmit data at real time.I developed a midlet,the midlet send a http request to the server.
The server send back a response header with a large content-length at first,Then the server will send back continuous data with many short data blocks at any time.
I want the gateway transmit the data block at real time to the midlet and keep the session until the midlet close the connection.
But Kannel cache all data before tansmit it to mobile deveice,How to disable the cache?
It is very important!!! please help me!!!

LTW