Trading API: Not able to update price

[anknegi]

Hi,

I am using your code of file : revise-item.php

Everything is working fine. But the price of product is not updating. My reviseItemType function is given below : public function reviseItemType($request) {
$item = new ItemType();
$item->SKU = $request['sku'];
$item->Quantity = (Integer)$request['quantity'];
$item->StartPrice = new AmountType(['value' => (Double)$request['price']]);

    $item->Title = (String) $request['productname'];
    $item->Description = (String) $request['description'];
    $item->Country = 'AU';
    $item->Location = 'Norfolk Island';
    $item->PostalCode = '2899';
    $item->Currency = 'USD'; 
    return $item;

}

Is I am missing anything ?