How to use "Microsoft.SharePoint.dll" API in custom assembly of SSRS report

Hi,

Recently i had following requirement:-

• Have to create a custom assembly (say MyAssembly.dll) for SSRS report (say MyReport.rdl)
• Inside the code of "MyAssembly.dll" I have to use API of "Microsoft.SharePoint.dll" like creating SPSite, SPWeb etc object based on some sharepoint site url. Below is a method called "GetReportTitle"as shown below

• namespace SSRS.ResourcesEx
  {publicstaticclass MyClass
      {publicstaticstring GetTitle()
          {string strTitle = string.Empty;try
              {
                  SPSecurity.RunWithElevatedPrivileges(delegate()
                  {using (SPSite site = new SPSite("http://<ServerName>/Site/"))
                      {using (SPWeb web = site.OpenWeb())
                          {
                               strTitle = web.Title;
                          }
                      }
                  });
  
              }
              catch (Exception ex)
              {
                  strTitle = ex.Message + "-----" + ex.StackTrace;
              }return strTitle;
          }
      }
  }

• MyAssembly.dll is added to GAC so that it is fully trusted.
• Also i have applied "[assembly: AllowPartiallyTrustedCallers()]" to MyAssembly.dll
• Report"MyReport.rdl" have reference of MyAssembly.dll
• Inside report MyReport.rdl i have a chart whose Title is based on a static method "GetReportTitle" that is present inMyAssembly.dll.
• However when i try to access the report the chart title displays the error message for sharepoint security error as shown below
• This is because i am using Sharepoint API in  GetReportTitle.If I comment code of sharepoint API in method then every thing works fine.
• I think this error is related to code access security policy.
• But i am depolying the custom assembly in GAC so that it is fully trusted.

Do i need to make any entry in "C:\Program Files\Microsoft SQL Server\MSRS10_50.MSSQLSERVER\Reporting Services\ReportServer\rssrvpolicy.config" file of report server ?

Please help me if any body have any idea !