Prompt Hierarchy in BO WEBI Report

Hi,

currently we have to implement a functionality in BO WEBI report Prompt where Network and Equipment 2 prompt  fields

are present.

User want if they select a Network then the Equipment that belong to that selected Network should shown in Drop Down Values

of Equipment Prompt.

This is a type of Prompt Hierarchy.

Source for the WEBi Report is BW Bex Query. and there is no Hierarchy maintained in Network and Equipment at Bex and

Bw system as well.

Please let me know how can i achieve this.

we are Using SAP-BI4.0 solution.

Regards

Atul