Bex Report not executing on EP 7.3 Iview (BI - Abap Stack only, EP 7.3)

Hello Experts,

We have an requirement of Integrating BI 7.3 with Portal 7.3, we want WAD Reports to be executed on EP

1) We have Done SSO between EP And BI System

2) System Object is Created

3) When we trying to create Iview of BEX 7.3 report, its executing that report on BI server, we don't have java stack on BI System

4) We have updated the required table in Bi system for executing the report on EP

5) RFC is OK, System Object Test is OK, Report is working independently from Business Explorer, but not working from EP

there no irj services available on BI system, as it is only abap stack

Can anybody help us in achieving our requirement

Thanks in advance

Sagar Pande