need help in web config

hi every body ,i need help ,,,,i'm beginner in asp.net , i host my first web,and i face a security problem . i used Forms Authentication in my web config file ,in my web pages i use report viwer, the problem is when i go to report page then return to other page the content of session changes so it open wronge page ,this is my config file.
<?xml version="1.0"?>
<configuration>
<connectionStrings>
<add name="dbConnectionString1" connectionString="Data Source=tcp:===== ;Initial Catalog======;User ID=-----;Password=---;Integrated Security=False;" providerName="System.Data.SqlClient" />
</connectionStrings>

<machineKey validationKey="859620317CEB125AB1DCC6BF967992A875BE672215EA2C3FE4800366F2F05EECD2AAE5C12F21B31C78331653EE0DC49C4A226A5E6655CDDF37EF2E68B9960D20" decryptionKey="10F75DA0E4CD692DA3AEADEA9501D4A14844540AE6D578351323931EF7F6E069" validation="SHA1" decryption="AES" />

<system.web>
<sessionState mode="InProc" cookieless="false" timeout="40" />
</system.web>

<system.web>
<httpHandlers>
<add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
validate="false" />
</httpHandlers>
<trust level="Full"/>
<httpRuntime maxQueryStringLength="4096" />
<compilation debug="true" strict="false" explicit="true" targetFramework="4.0">
<assemblies>
<add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
<add assembly="Microsoft.ReportViewer.Common, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
</assemblies>
<buildProviders>
<add extension=".rdlc" type="Microsoft.Reporting.RdlBuildProvider, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
</buildProviders>
</compilation>
</system.web>
<system.webServer>
<handlers>
<add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
</handlers>
<validation validateIntegratedModeConfiguration="false" />
</system.webServer>
<system.web>
<authentication mode="Forms">
<forms loginUrl="default.aspx" protection="All" timeout="30" name=".ASPXAUTH" path="/" requireSSL="false" slidingExpiration="true" defaultUrl="default.aspx" cookieless="UseCookies" enableCrossAppRedirects="false" />
</authentication>
<authorization>
<deny users="?" />
</authorization>
</system.web>
<location path="Images">
<system.web>
<authorization>
<allow users="?" />
</authorization>
</system.web>
</location>
<location path="default.aspx">
<system.web>
<authorization>
<allow users="*" />
</authorization>
</system.web>
</location>
<location path="Reserved.ReportViewerWebControl.axd">
<system.web>
<authorization>
<allow users="?" />
</authorization>
</system.web>
</location>
<system.web>
<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID">
<namespaces>
<clear />
<add namespace="System" />
<add namespace="System.Collections" />
<add namespace="System.Collections.Generic" />
<add namespace="System.Collections.Specialized" />
<add namespace="System.Configuration" />
<add namespace="System.Text" />
<add namespace="System.Text.RegularExpressions" />
<add namespace="System.Linq" />
<add namespace="System.Xml.Linq" />
<add namespace="System.Web" />
<add namespace="System.Web.Caching" />
<add namespace="System.Web.SessionState" />
<add namespace="System.Web.Security" />
<add namespace="System.Web.Profile" />
<add namespace="System.Web.UI" />
<add namespace="System.Web.UI.WebControls" />
<add namespace="System.Web.UI.WebControls.WebParts" />
<add namespace="System.Web.UI.HtmlControls" />
</namespaces>
</pages>
</system.web>

</configuration>

 

Could you please provide a bit more detail and provide any steps or links so what we can see the issue on our end?

 

my question is i want some body show me web config file for asp.net web site that include ReportViewer and Forms Authentication

 

Try looking at these links.

http://odetocode.com/articles/428.aspx
http://msdn.microsoft.com/en-us/library/ms251661(v=vs.80).aspx

 

the proplem is not solved. when i navigate the web after 3 or 4 the content of session is empty although i set the session time out in web config 30 minutes

 

thanks