Error while Running SQL Reporting Services

Hi,
I have recently installed SQL Reporting Service for SQL 2005 and started using it. I have one existing code that was using reporting services. But when now I try to run application it gives following error:
=============================================================
The request failed with HTTP status 503: Service Unavailable.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Net.WebException: The request failed with HTTP status 503: Service Unavailable.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[WebException: The request failed with HTTP status 503: Service Unavailable.]
System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) +533199
System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) +204
Ti.Dosa.Reports.ReportingServices.ReportingService.Render(String Report, String Format, String HistoryID, String DeviceInfo, ParameterValue[] Parameters, DataSourceCredentials[] Credentials, String ShowHideToggle, String& Encoding, String& MimeType, ParameterValue[]& ParametersUsed, Warning[]& Warnings, String[]& StreamIds) +175
Ti.UIWeb.NDD.ReportViewer.RenderReport(String[] reportParmsStr, String reportLocation, String reportFormat) +525
Ti.UIWeb.NDD.ReportViewer.Page_Load(Object sender, EventArgs e) +467
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +47
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061
--
Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210
=============================================================
Please let me know what might be the problem.

Thanks,
Deepak

sounds to me like your website is running.

Did you run the ssrs setup tool?

|||Yes, Web Site is running but when I try access functionality which is using Reporting Services the mentioned error is popping up and yes, I have executed ssrs setup tool

--Deepak