Hi,
Please find the following links it will be useful to you.
http://www.devx.com/codemag/Article/33656/1954
http://msdn.microsoft.com/en-us/library/ms159238.aspx
http://sandeep-aparajit.blogspot.com/2010/02/how-to-execute-and-save-ssrs-report.html
Thanks & Regards, MS CRM Consultant, V.Surya.