Help on APD within ET1 and QL320plus printer

From ET1, I am trying to make a printout on QL320plus printer make of Zebra by using Bluetooth technology.

On ET1, I am using Android version 2.3.4, with RhoElement version

By taking the help from documentation of APD Programmers manual, we develop one application. And this application is successfully working on MC75 with the same printer.

But when we run this same application on ET1 it is not working.

For reference the developed html5 page is attached, please check.

In this the PID we used is BC53:1.

Can anyone please help on this.