Saving Data from EC Advanced List Pane in Material BO

Hi,

I am pretty new to PDI development, and I am trying to create a list in the standard Material business object to save some addition data for each products.

I have created an advanced list pane and attached it to the Material BO, created an inport and bind it to the material outport, but I can't seem to save the data in the list. Every time I refresh it the data will be gone.

What is the correct process to make this work?

Thanks.

Regards,
Calvin