Global.asax Error(SessionStart)

The system cannot find the file specified

Pdb Info

0-->AnalyseExceptions, BirdSystems.LibCore.Framework.DataLayer.Utils(TElite_LibCoreMvc_V50.dll)
1-->AnalyseExceptions, BirdSystems.LibCore.Framework.DataLayer.cToolErrors(TElite_LibCoreMvc_V50.dll)
2-->LoadRecords, BirdSystems.LibCore.Framework.DataLayer.cToolQueries(TElite_LibCoreMvc_V50.dll)
3-->LoadRecord, BirdSystems.LibCore.Framework.DataLayer.cToolQueries(TElite_LibCoreMvc_V50.dll)
4-->LoadRecord, BirdSystems.LibCore.Framework.DataLayer.cToolDal(TElite_LibCoreMvc_V50.dll)
5-->BeginRequest, BirdSystems.LibCore.Framework.AppRequest.cToolBeginRequest(TElite_LibCoreMvc_V50.dll)
6-->AppBeginRequest, ASP.global_asax(App_global.asax.dll)
7-->Session_Start, ASP.global_asax(App_global.asax.dll)
8-->RaiseOnStart, System.Web.SessionState.SessionStateModule(System.Web.dll)
9-->CompleteAcquireState, System.Web.SessionState.SessionStateModule(System.Web.dll)
10-->BeginAcquireState, System.Web.SessionState.SessionStateModule(System.Web.dll)
11-->System.Web.HttpApplication.IExecutionStep.Execute, System.Web.HttpApplication+AsyncEventExecutionStep(System.Web.dll)
12-->ExecuteStepImpl, System.Web.HttpApplication(System.Web.dll)
13-->ExecuteStep, System.Web.HttpApplication(System.Web.dll)
14-->ResumeSteps, System.Web.HttpApplication+PipelineStepManager(System.Web.dll)
15-->BeginProcessRequestNotification, System.Web.HttpApplication(System.Web.dll)
16-->ProcessRequestNotificationPrivate, System.Web.HttpRuntime(System.Web.dll)
17-->ProcessRequestNotificationHelper, System.Web.Hosting.PipelineRuntime(System.Web.dll)
18-->ProcessRequestNotification, System.Web.Hosting.PipelineRuntime(System.Web.dll)
19-->MgdIndicateCompletion, System.Web.Hosting.UnsafeIISMethods(System.Web.dll)
20-->ProcessRequestNotificationHelper, System.Web.Hosting.PipelineRuntime(System.Web.dll)
21-->ProcessRequestNotification, System.Web.Hosting.PipelineRuntime(System.Web.dll)