Service PSReportFactory not found on the client side

Hi all.

I am using DHTML Report Page Viewer and want to get IReportSource by IReportSourceFactory, and I can not fix the error: Service PSReportFactory not found on the client side.

Error occurs on the line:

IReportSourceFactory reportSourceFactory = (IReportSourceFactory) enterpriseSession.getService("PSReportFactory");

1. How to solvethis problem 2. How to get IReportSource another?