Hi Baig,
The help documentation at Extracting Data from an Audit Package to the BW System - SAP Information Lifecycle Management - SAP Library will help you in extracting data to BW (in case you have not seen the link already).
If you are facing issues during the creation of Audit Packages, can you please share more details about the issue. Or you can create an incident for SAP to have a look.
Thanks and Regards,
Santo.