Saving node with cck fields doesn't work

Hi,

Maybe our syntax is wrong, but the module doesn't save fields of nodes having CCK fields, for example, CCK named "field_test". The content type was named "test":

AS3 code: (works fine with Drupal6 module, but not with Drupal7 module)
sequence.add(new CallbackTask(_proxy.setRemoteCallId, "node.create"));
var node:Object = DrupalUtils.createNode("test", "test title", "test body");
node.field_test = new Array({value: "my test val"});
sequence.add(new DrupalInvokeTask(_proxy, "node", "create", node));

The node is created, but the CCK is empty.
What is the syntax for saving a CCK field in a node? is it a bug?
It doesn't work for us..

Thanks,
Guy.