Content Handler Settings in wtk

Hi,

I installed a sample hello world application on my cell (w810i).

Later on I went to the Settings for my project.
Chose the "Content Handlers" and there added my hello world midlet class name under basice settings along with a key.

Then for content types I added 2 types:
01. text/plain
02. .jpg

I was expecting the following behaviour after installing the new jar.
Whenever I would bluetooth a .txt or a .jpg file to my cell the hello world midlet would be invoked.

This is not happening.
Is my understanding of "content handlers" incorrect or is my cell ignoring "content handlers".

I checked the manifest file and it looks ok:

Manifest file:

Is something missing?