出现错误：无法加载一种或多种请求的类型。检索LoaderExceptions属性以获取更多信息

我在服务器上上传网站时遇到此错误。即使我在Visual Studio中的本地服务器上运行它也能正常工作。请帮助我解决此问题。我正在将Visual Studio 2012与sql server 2008一起使用。是项目文件夹之外的packages文件夹，可能是我也需要上传dat ..请帮助

我得到的错误：

Server Error in '/' Application.

Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.

    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.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.

    Source Error: 


    Line 96:          
    Line 97: 
    Line 98:         <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"></asp:ToolkitScriptManager>
    Line 99:      
    Line 100:<header>

    Source File: g:\pleskvhosts\hitchtechnologies.com\manshasweets.hitchtechnologies.com\MasterPage.master    Line: 98 

    Stack Trace: 


    [ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.]
       System.Reflection.RuntimeModule.GetTypes(RuntimeModule module) +0
       System.Reflection.RuntimeModule.GetTypes() +4
       System.Reflection.Assembly.GetTypes() +61
       AjaxControlToolkit.ToolkitScriptManagerConfig..cctor() in ToolkitScriptManagerConfig.cs:32

    [TypeInitializationException: The type initializer for 'AjaxControlToolkit.ToolkitScriptManagerConfig' threw an exception.]
       AjaxControlToolkit.ToolkitScriptManager..ctor() in ToolkitScriptManager.cs:114
       ASP.masterpage_master.__BuildControlToolkitScriptManager1() in g:\pleskvhosts\hitchtechnologies.com\manshasweets.hitchtechnologies.com\MasterPage.master:98
       ASP.masterpage_master.__BuildControlform1() in g:\pleskvhosts\hitchtechnologies.com\manshasweets.hitchtechnologies.com\MasterPage.master:93
       ASP.masterpage_master.__BuildControlTree(masterpage_master __ctrl) in g:\pleskvhosts\hitchtechnologies.com\manshasweets.hitchtechnologies.com\MasterPage.master:1
       ASP.masterpage_master.FrameworkInitialize() in g:\pleskvhosts\hitchtechnologies.com\manshasweets.hitchtechnologies.com\MasterPage.master.cs:912308
       System.Web.UI.UserControl.InitializeAsUserControlInternal() +32
       System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection) +655
       System.Web.UI.Page.get_Master() +54
       System.Web.UI.Page.ApplyMasterPage() +14
       System.Web.UI.Page.PerformPreInit() +45
       System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +335

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.18056

如果我做错了什么，这是我的web.config.please帮助我：

<?xml version="1.0"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
  <connectionStrings>
    <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <appSettings>

    <add key="connectionString" value="Data Source=Node-6-PC;Initial Catalog=dbMansha;user id=sa; password=hitch@123;"/>

    <add key="SiteFileFolder" value=""/>
  </appSettings>
  <system.web>
    <sessionState cookieless="false" regenerateExpiredSessionId="true" timeout="129600" />
    <globalization culture="en-GB"/>
    <compilation debug="true" targetFramework="4.5">

    </compilation>
    <httpRuntime maxRequestLength="12000" useFullyQualifiedRedirectUrl="true" executionTimeout="45"/>
    <authentication mode="Forms">

      <forms timeout="129600"/>
    </authentication>
    <membership>
      <providers>
        <clear/>
        <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/"/>
      </providers>
    </membership>
    <profile>
      <providers>
        <clear/>
        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/>
      </providers>
    </profile>
    <roleManager enabled="false">
      <providers>
        <clear/>
        <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/"/>
        <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/"/>
      </providers>
    </roleManager>
  </system.web>

</configuration>