Error when more than 1 BOs in the EC

Hi,

I have created a BO extension of customer and create the embedded component for it.

I've successfully display in the customer tab (under the undefined).

I've further test to include another custom BO into this same embedded component with AdvancedListPane. 

When i test it, i've encountered the following error upon the loading of the tab.

Any idea?

Thanks.

cheers,

julius