Helo Priyanka,
there could be many reasons why you don't see org. structure. To make 100% sure the org.structure is there, please, check entries in table HRP1000. You should see your org. units, positions and other object which you have defined.
Relationships are then stored in table HRP1001.
In both tables check field BEGDA and ENDDA.They define validity of the object/relationship.
This could be one of the reason - you may have limited validity of the objects and by default, PPOMA_CRM will show you structure valid to date + 3 months. You can change the decision - click button on the top of the screen or in menu Settings.
Regards,
Dawood.