Problem with Compression/Decompression using QuickTime JPEG2000 codec

I am posed with a weird compression/De-compression problem using QuickTime JPEG2000 codec.

Platform: PC, Win2k
QuickTime SDK  7.0.4

I am using the QuickTime call CompressImage to compress image raw data using JPEG2000 codec.

The compress image function works fine , I am sure because when i use the equivalent but opposite DecompressImage ,
 it draws the proper image onto the default port , because I dont set any specific port with the PixMapHandle parameter.

But the DecompressImage function is not populating the PixMapHandle parameter which it is supposed to.

My problem is that i want the decompressed "raw data" back from the compressed data.

And since I have to write the compressed data to a file , I would love to avoid writing the ImageDescriptionHandle to the file.

So in effect I want the raw data back from compressed image and the size but not using the ImageDescriptionHandle.

Probably the code and the comments below would make the problem more clear.
 

//Create GWorld from the raw image data.
//data is char *imageData.
    
    GWorldPtr gWorldPtr = NULL;
    Rect imageRect;
    imageRect.left        = 0;
    imageRect.top        = 0;
    imageRect.right        = imageWidth;
    imageRect.bottom    = imageHeight;

    long rowBytes        = imageWidth*4; //image is a 32 bit image

    QTNewGWorldFromPtr( (GWorldPtr *) &gWorldPtr,
                                       k32BGRAPixelFormat),
                                       &imageRect, 0, 0, (GWorldFlags)0, (unsigned char *)imageData, rowBytes);
//Get the PixMapHandle    
    PixMapHandle    srcPM;
    if (gWorldPtr != NULL) {
        srcPM  = GetGWorldPixMap(gWorldPtr);
    }    
   
    
//Compression Details
    Ptr compressedImage = NULL;
    ImageDescriptionHandle compressionImageDesc;

    //get compression size
    OSErr err = GetMaxCompressionSize(srcPM,&imageRect,0,codecHighQuality,kJPEG2000CodecType,anyCodec,&compressedSize);
    if (err == noErr ) {
        //Allocate memory for compressed Image..
        compressedImage = NewPtr(compressedSize);
        compressionImageDesc =(ImageDescriptionHandle)NewHandle(4);
            if ( ( compressedImage!=NULL ) && (imageDesc !=NULL)) {
            //Compress image
               err = CompressImage(srcPM, &imageRect, codecHighQuality, kJPEG2000CodecType, compressionImageDesc,compressedImage);
        }
    }


Till this the code is proper.

Now lets suppose that the compressedImage and the compressedSize = (**compressionImageDesc).dataSize are written to a file.

Now in another application , these two parameters are read , and decompression has to be achieved as stated before.

I tried using QuickTime exporter to export the data to a handle and used the importer to draw the image to an off screen GWorld.
In both cases either I encounter error in some step or get an invalid image data.

Any help in this regard would be highly appreciated.

Thanks in advance.

Regards,