Hello Namita,
in fact, I upoaded the report using the connetion to the JasperReports Server configured with the superuser from the Studio. I could not use the CA PPM user as I don't know the password created by CA PPM in Jaspersoft.
What I can do with my CA PPM user is to edit the report and change the input control or define whether it should appear in page or as a pop-up. Therefore, the rights on the report is not the problem.
The problem is that independently from the report, the CA PPM user is not able to create a query resource on the CA PPM datasource "CA PPM BEAN" despite the fact the user has the roles ROLE_REPORT_DESIGNER and ROLE_DATASOURCE_DESIGNER which both have read rights on the datasource.