"failed" Error when running a report

[Jaspire]

Hi,
When a user runs report, gets an error. But when I run the same report by logging in as the user,
Then I don't get any error except that the first page of the report is blank. I gave the error below. I appreciate if you could suggest possible reasons on why this is happening and how I can clear this.
Thanks,
Madhavi

"CCL-RCI-0002 The Soap server returned a Soap fault.
CM-REQ-4203 The report owner's credentials could not be authenticated.
CM-CAM-4005 Unable to authenticate. Check your security directory server connection and confirm the credentials entered at login.
CM-REQ-4231 Unable to create security object proxy. Could not retrieve user information required to create account proxy object for object "Cognos Series 7:u:authid=105511022".
Trace back:
WPBIBusMethod.cpp(198): RCI_SoapFaultException: CCL_CAUGHT: WPBIBusMethod::runRequest
WPBIBusMethod.cpp(1071): RCI_SoapFaultException: CCL_RETHROW: WPBIBusMethod::getReportProperties
WPCMBatchGet.cpp(121): RCI_SoapFaultException: CCL_RETHROW: WPCMBatchGet::execImpl
RCIExceptionHelper.cpp(484): RCI_SoapFaultException: CCL_THROW: RCI::query ( QueryRequestArray * requests, EXCENV_DECL env )  "

[ramaanujamr]

May be the reason is gateway  or  find the user has product( report studio) access or not. Errorlook kije there is no proper access for this user. if the user access from the out side of the network, give the proper server name in the gateway url.
Thanks
Ram