DocumentGalleryModel Connection Error in C5-03

I am using QML DocumentGalleryModel to access the gallery. Here is the sample code I used.
----------------------------------------------------
DocumentGalleryModel
{
id:testModel
rootType:DocumentGallery.Audio
autoupdate:true
properties:["url","filename","path","fileExtension","albumTitle","artist"]
}
-----------------------------------------------------

When I run the above code in C5-03 and X6, I get the following error:
QML DocumentGalleryModel:An error was encountered connecting to the document gallery.

When I run the same code in Nokia C6-00, it runs without any problem.

Also , I have observed a change in the gallery in these two devices(C5-03 and C6).
Is this problem due to the change in gallery?