SAP Analysis for Office Data Source

Hi All,

This is my first time using SAP Analysis for Office (AFO) using version 2.8. I have a problem with Data Sources.

When selecting a data source, my AFO only shows a number of the data sources. Like the picture below. (Customer A)

In another system, AFO can show many Data Sources. (Customer B)

How can I get a full data source like the picture above (Customer B)? Thanks in advance.