sharepoint-shared search scope

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MOSS2007

SharePoint

webservice

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Hi everyone,

I havre installed MOSS 2007.

I have created a shared search scope and added it to the sharepoint search dropdown box in the home page...while click on search by entering some values in search dropdown am getting the following error!!!!!!!!!

File Not Found.   
at Microsoft.SharePoint.Library.SPRequestInternalClass.OpenWebInternal
(
String bstrUrl, 
Guid& pguidID, 
String& pbstrRequestAccessEmail, 
UInt32& pwebVersion, 
String& pbstrServerRelativeUrl, 
UInt32& pnLanguage, UInt32& pnLocale, 
String& pbstrDefaultTheme, 
String& pbstrDefaultThemeCSSUrl, 
String& pbstrAlternateCSSUrl, 
String& pbstrCustomizedCssFileList, 
String& pbstrCustomJSUrl, 
String& pbstrAlternateHeaderUrl, 
String& pbstrMasterUrl, 
String& pbstrCustomMasterUrl, 
String& pbstrSiteLogoUrl, 
String& pbstrSiteLogoDescription, 
Object& pvarUser, 
Boolean& pvarIsAuditor, 
Int32& plSiteFlags
) 
   at Microsoft.SharePoint.Library.SPRequest.OpenWebInternal(String bstrUrl, Guid& pguidID, String& pbstrRequestAccessEmail, UInt32& pwebVersion, String& pbstrServerRelativeUrl, UInt32& pnLanguage, UInt32& pnLocale, String& pbstrDefaultTheme, String& pbstrDefaultThemeCSSUrl, String& pbstrAlternateCSSUrl, String& pbstrCustomizedCssFileList, String& pbstrCustomJSUrl, String& pbstrAlternateHeaderUrl, String& pbstrMasterUrl, String& pbstrCustomMasterUrl, String& pbstrSiteLogoUrl, String& pbstrSiteLogoDescription, Object& pvarUser, Boolean& pvarIsAuditor, Int32& plSiteFlags) 
   at Microsoft.SharePoint.SPWeb.InitWebPublic() 
   at Microsoft.SharePoint.SPWeb.get_Locale() 
   at Microsoft.SharePoint.WebPartPages.Utility.SetThreadCulture(SPWeb spWeb, Boolean force) 
   at Microsoft.SharePoint.Utilities.SPUtility.SetThreadCulture(SPWeb spWeb) 
   at Microsoft.SharePoint.ApplicationRuntime.BaseApplication.Application_PreRequestHandlerExecute(Object sender, EventArgs e) 
   at Microsoft.SharePoint.ApplicationRuntime.SPRequestModule.PreRequestExecuteAppHandler(Object oSender, EventArgs ea) 
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) 

I recovered the master pages and the core.css and restarted the IIS but still having the problem,

any ideas to know whats going on?