Displaying ERP Sales orders in CRM ISU BOL Tree

Hi,

I need to display ERP Sales orders of a BP in the CRM Web UI  ISU BOL Tree.

We are using CRM 7.0 EHP3. The Genil Component for ISU BOL Tree is IUICALL.

Is there any relation/object which can give the list of ERP Sales orders for a BP.

I have tried with Genil Component ERP and query ERPQORDER, but it's not returning any orders for the given BP even the orders are available in ERP.

Can you please suggest whether I need to do any configuration wrt RFC set up to get ERP data ?

Also please suggest what are the prerequisites to be followed to access the ERP Sales Order data from CRM.

Thanks

Jayasri