trouble in accessing all the private and public items through rest api

I want to harvest the items from

I am able to get all the public coins in omeka-xml format.
I have created an api key to access the private items.
However, i am unable to access the private items through the api call using apikey.

Is there any authroization part i need to handle.

Please reply.


There's nothing more for authentication than the key. Make sure that the param is key, not apikey