Opera : ImageUploader_Progress function never invoked

iu.javaAppletVersion = "5.1.10.0";

iu.addEventListener("Progress", "ImageUploader_Progress");

function ImageUploader_Progress(...){
   F_CODE
}

Function ImageUploader_Progress never invoked after upload complete.

Neither F_CODE nor embed routings (like upload list cleanup) are executed.

Opera 9.25

Both FireFox and InternetExplorer are OK.

Thank You for consideration.

All other events are also did not fired in Opera.

But uploading is compliting sucessfully.

I have the latest Java 6 upd 5. Its a widely spread opinion that Java is heavy and sloy but have advantage in platform independence. But Java independence fails even within one platform. Its a pity.