Running long report problem in Report server

i am trying to run few reports(MS Reporting server) that can be big if i set time period ALL, but also those report are getting error code 800708CA in RS log if i just set small amount of data. Error code is:

ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ClosingRegisteredStreamException: , Microsoft.ReportingServices.Diagnostics.Utilities.ClosingRegisteredStreamException: An error occurred closing a registered stream. ---> Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerHttpRuntimeClientDisconnectionException: A client has disconnected from the Report Server Web service application domain ReportServer_SSRS_0-3-131959013894837810. No corrective action is required. An error code has been submitted to ASP.NET to release the connection. The error code is 800708CA. ---> System.Runtime.InteropServices.COMException: This network connection does not exist. (Exception from HRESULT: 0x800708CA)

What can i do to solve this error. Time out in RS is set to 1800 s, that is enough. Running the same report in MS SQL Studio in done in coupled of seconds.