Over the air problem

Hi,
I have developed a game for midp phones (only tested on SE T610 at the moment).
When I bluetooth the Jar and Jad to the T610 it works fine, in fact I dont even need to send the Jad.
I submitted these two files to handango and activated my game for sale. Next I purchased and download it to see if it would work and it did not. I was sent a text message with a link which I followed. The phone proceeded to say: connecting... downloading Puzzle Cube.... then after only one or two seconds I got the message 'Inavalid Application'.
I now learn that 'over the air' you need the Jad. This is the one I had uploaded:
MIDlet-1: Puzzle Cube, Puzzle Cube.png, PuzzleCube
MIDlet-Jar-Size: 59435
MIDlet-Jar-URL: Puzzle Cube.jar
MIDlet-Name: Puzzle Cube
MIDlet-Vendor: Sony Ericsson
MIDlet-Version: 1.0
After studying it I realise that is refering to Puzzle Cube.png which does not exist.
Could this be the cause of the problem and if so would I be right to just remove the reference like the following?
MIDlet-1: Puzzle Cube, PuzzleCube
MIDlet-Jar-Size: 59435
MIDlet-Jar-URL: Puzzle Cube.jar
MIDlet-Name: Puzzle Cube
MIDlet-Vendor: Sony Ericsson
MIDlet-Version: 1.0
In fact do I need the 'MIDlet-1: Puzzle Cube, PuzzleCube' line at all? What does it do?
Any help would greatly appreciated,
Thanks a lot,
Jim

yep. you need it, because this line defines which classes (or midlets) are part of this MIDlet suite. If you dont have this line, you wont be able to launch anything.
If this png does not exist, you have to change the line to this:
MIDlet-1: Puzzle Cube,,PuzzleCube
First is the name displayed on the phone, second the icon and third the appropriate class to execute.
hth
Kay

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