Performance Point Services - Unable to connect to site from Dashboard designer

Recently we moved the Reports site collection from one environment to other. So the Performance point content is also copied.Now I wanted to change the report paths that were deployed using Performance point services. When I try to open the report file from perforamnce pointcontent  list it shows unexpected error. If I am trying to connect to the using Dashboard designer it says URL is not available does not reference Sharepoint Site or you do not have permissions to connect.

Pleasee see the attached file for more details.

How do the reports be fixed when they are to be deployed using Performance point services(Dashboard designer). Unfortunately we do not have the dashboard designer ddwx file with us. Its been developed by vendor and they have not given us.

How should the Dashboard reports(SSRS Report )  be moved from one environment to other.What is the best way to move the performance point dashboards from one environment to other.

Environment- Sharepoint 2010