Dificuldades com web.config

Pessoal,

Tenho esse web.config ele funciona perfeito qnd acesso um ou duas vezes a aplicação mas depois ela passa não carregar e nao dar erro, simplismente aparece uma tela em branco.

Alguem tem uma dica, seja de alteração do web.config, de componentes ou até do servidor?

web.config

<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication" />
 <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
 <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="Everywhere" />
 <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication" />
 <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication" />
 </sectionGroup>
 </sectionGroup>
 </sectionGroup>
 </configSections>
 <connectionStrings>
 <add name="PopwebSQLServer" connectionString="Data Source=mssql5.hosting.net;Initial Catalog=baseName;User Id=userID;Password=PassWORD;" providerName="System.Data.SqlClient" />
 </connectionStrings>
 <appSettings>
 <add key="FCKeditor:BasePath" value="/App_fckeditor/" />
 </appSettings>
 <runtime>
 <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
 <dependentAssembly>
 <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/>
 <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
 </dependentAssembly>
 <dependentAssembly>
 <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>
 <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
 </dependentAssembly>
 </assemblyBinding>
 </runtime>
 <system.web>
 <customErrors mode="Off"/>
 <authentication mode="None"/>
 <httpRuntime maxRequestLength="111000"/>
 <compilation debug="false"/>
 <pages>
 <controls>
 <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
 <add tagPrefix="FCKeditorV2" namespace="FredCK.FCKeditorV2" assembly="FredCK.FCKeditorV2"/>
 </controls>
 </pages>
 <httpHandlers>
 <remove verb="*" path="*.asmx"/>
 <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
 <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
 <add verb="*" path="*_AppService.axd" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
 </httpHandlers>
 <httpModules>
 <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
 </httpModules>
 </system.web>
 <system.webServer>
 <validation validateIntegratedModeConfiguration="false"/>
 <modules>
 <add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
 </modules>
 <handlers>
 <remove name="WebServiceHandlerFactory-ISAPI-2.0"/>
 <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
 <add name="ScriptResource" verb="GET" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
 </handlers>
 </system.webServer>
	</configuration>