addInventoryIdentifier method

Hello

I did some changes to APT PHP Sample Code , added addInventoryIdentifier function and i called it from demoPublisher function

When tried to add AdSize to a website using addInventoryIdentifier method, the service returns error message says: Insufficient Parameters, despite sending all parameters described in yahoo apt service overview and apt api reference.

Please help me to find the error, here is the php code:

CODE

<?php
function addInventoryIdentifier($publisherAccountID, $accountLocation,$siteID) {
    $inventoryData['name']="My Inv";
    $inventoryData['siteID']=$siteID;
    $targetingAttributeDescriptors = array();
    
    $targetingService = self::createClient("TargetingDictionaryService", $publisherAccountID, $accountLocation);
    
    $response =  self::execute($targetingService, "getTargetingAttributesByValue",array('targetingAttributeType'=>'AdSize','value'=>'468x60'));
    $adSizeAttr  = $response->out->TargetingAttributeValue;
    
    $adSizeDescriptors['targetingAttributeID'] = $adSizeAttr->ID;
    $adSizeDescriptors['targetingAttributeType'] = $adSizeAttr->type;
    
    
    
    $inventoryData['targetingAttributeDescriptors'][0]=$adSizeDescriptors;
    
    
    $inventoryService = createClient("InventoryIdentifierService", $publisherAccountID, $accountLocation);
    
    $response = execute($inventoryService, "addInventoryIdentifier",array('inventoryIdentifier'=>$inventoryData));
}
?>