Hi
Check the Joins
Entire SQL Query you copy and Paste it in Database
IN the Edit Query screen, click the SQL button. If the button is grayed out then your admin will have to grant you the rights. If you clicked the SQL button, a window will open. CLick the Copy button to copy the SQL into your clipboard. Open your SQL tool, paste the SQL in and execute the SQL. If you don't have a SQL tool, then give the code to your DBA to execute.
The JOIN conditions are probably wrong or there are row restrictions in the WHERE clause.
ow level security can be in the database or the universe. To look in the universe go to Tools - Access Restrictions and see if there are any defined and whether they are applied to your account. More details on access restrictions can be found in the Designer documentation.