Problem regarding Discoverer to OBIEE Migration

Hi,
I am trying Discoverer to OBIEE Migration by using simple apps tables for practicing purpose facing some issue here , so i would like to get help from you all experts.
The tables that used in .exx file are as follows:
        po_requisition_headers_all ,
        po_requisition_lines_all ,
        po_req_distributions_all ,
        po_distributions_all ,
        po_headers_all .
I have created .eex in Discoverer it contains above tables, using OBIEE migration utility I have migrated .exx file into the .rpd . Create a connection pool so physical table views the data in physical layer tables upto here i followed the following link :
Article: Migrating Oracle Discoverer Data to Oracle Business Intelligence 11g
when .eex is migrated into .rpd facing following problems:
1. The joins between the tables are not visible into the Physical Layer. So i need to create it manually or what?
2. About Hierarchy,Complex folders Hierarchies are not migrated as above link so I need to create it manually or what?
3.
    - Complex folders based on other complex folders are not migrated.
    - Summary folders are not migrated.
    -The system cannot migrate complex folders that are dimensions.
    -Hierarchies based on Complex Folders are not migrated.
So what are the steps that I need to follow to overcome this all.
Please reply me all or some points that you know or you already overcome this types of senario.
Thanks

Its the same as you'd get if you were creating the repository from scratch. Username: Administrator with no password.
Full details of what is done can be found here...
Disco Conversion

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http://www.oracle.com/technology/software/htdocs/devlic.html?url=/technology/software/products/ias/htdocs/101310.html
http://www.oracle.com/technology/documentation/appserver10132.html
http://www.oracle.com/technology/obe/start/index.html
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Viral
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