Transaction downloads are always nil

Question

I'm working on an application for iPad. it has In App purchases of a non-consumable type. so I'm using Hosted Content feature provided by apple.
the problem is the 'downloads' property for 'transaction' is always 'nil'

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
{
    for (SKPaymentTransaction *transaction in transactions)
    {
        if (transaction.downloads) {
            [[SKPaymentQueue defaultQueue] startDownloads:transaction.downloads];            
    }
}

I'm setting the state for the application in iTunesConnect as 'Developer Rejected' and the status for the in-app purchase product is 'ready to submit'.
the content for in-app purhcase product has been uploaded through XCode.

any help would be appreciated alot.
many thanks...

Answer 1

it was just the targeted iOS must be set to iOS6 (the OS on the device must be iOS6) ... so i updated the device and it worked perfectly