How to use Update Client Product api

Hi,

Anybody know how to use/integrate Update Client Product api. I tried and it is showing as success, but not updating the config values or custom field values.

$postfields["action"] = "updateclientproduct";

postfields["serviceid"] = 229; tbhostings.id

$postfields["pid"] = 152; product id

$postfields["configoptions"] = base64_encode(serialize(array(565 => array('optionid' => '7758', 'qty' => '1'))));

565- configid, 7758- optionid in tblhostingconfigoptions table.

Also tried custom fields updation

$postfields["customfields"] = array("253"=>"test");

253- custom field id

but not updating anything. I am working on test environment, not in live. It is just showing 'updateclientproduct success 229".

Anybody why is it not updating?. Any issues if I use test site?. I have been working on the same for long time.Please........... help.

Thanks,

Dixon.