Error in exporting ssrs 2008 report to excel

I have a report returning around 90000 rows. But when i export it to excel from the asp.net page it gives this error:
An error occurred during rendering of the report
But the same report is getting successfully exported to excel from the report server.
If i pass some more parameters from the web page to reduce the number of records to 100, then i am able to export it to excel from the web page itself.

Edit-1
Stack Trace:
[Exception: For more information about this error navigate to the report server on the local server machine, or enable remote errors]

[Exception: An error occurred during rendering of the report.]
Microsoft.Reporting.WebForms.ServerReport.ServerUrlRequest(Boolean isAbortable, String url, Stream outputStream, String& mimeType, String& fileNameExtension) +574
Microsoft.Reporting.WebForms.ServerReport.InternalRender(Boolean isAbortable, String format, String deviceInfo, NameValueCollection urlAccessParameters, Stream reportStream, String& mimeType, String& fileNameExtension) +905
Microsoft.Reporting.WebForms.ServerReport.Render(String format, String deviceInfo, NameValueCollection urlAccessParameters, Stream reportStream, String& mimeType, String& fileNameExtension) +28
Microsoft.Reporting.WebForms.ServerReport.Render(String format, String deviceInfo, NameValueCollection urlAccessParameters, String& mimeType, String& fileNameExtension) +88
Microsoft.Reporting.WebForms.ServerReportControlSource.RenderReport(String format, String deviceInfo, NameValueCollection additionalParams, String& mimeType, String& fileExtension) +123
Microsoft.Reporting.WebForms.ExportOperation.PerformOperation(NameValueCollection urlQuery, HttpResponse response) +153
Microsoft.Reporting.WebForms.HttpHandler.ProcessRequest(HttpContext context) +585
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +901
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +76