The error about "Attempt to access the method failed"

      My web app was running fine on my localhost. After deploying onto a shared server (1&1), I'm getting the following error - any ideas? If I remove the mediachase stuff from my web.config, my app works.

Attempt to access the method failed.

[MethodAccessException: Attempt to access the method failed.]
   System.Reflection.MethodBase.PerformSecurityCheck(Object obj, RuntimeMethodHandle method, IntPtr parent, UInt32 invocationFlags) +0
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) +212
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +29
   System.Reflection.RuntimePropertyInfo.GetValue(Object obj, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture) +55
   System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index) +18
   Mediachase.FileUploader.McHttpModule.694a7e1d01f817ae(Object 337e217cb3ba0627, EventArgs fbf34718e704c6bc) +1109
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

Answer:

You are right. It's a problem with Medium Trust. ASP.NET 2.0 with Medium-trust turn-off ReflectionPermission.

To solve it, now, I can suggest you two way:

First, Turn-on ReflectionPermission

Find *:\WINDOWS\Microsoft.NET\Framework\v2.0.*\CONFIG\web_mediumtrust.config  file.
Create a copy.
Opend web_mediumtrust.config file.
Add lines into SecurityClasses section

                    <SecurityClasses>
                        <!-- Mediachase FileUploader.Net Addon -->
                        <SecurityClass Name="ReflectionPermission" Description="System.Security.Permissions.ReflectionPermission, mscorlib, Version=2.0.0.0, Culture=neutral,PublicKeyToken=b77a5c561934e089"/>
                        <!-- Mediachase FileUploader.Net Addon -->        

Add lines into PermissionSet section named ASP.Net

<PermissionSet
                                class="NamedPermissionSet"
                                version="1"
                                Name="ASP.Net">
                            <!-- Mediachase FileUploader.Net Addon -->
                            <IPermission 
                                       class="ReflectionPermission"
                                       version="1"
                                       Unrestricted="true" />
                            <!-- Mediachase FileUploader.Net Addon -->

Save file and run web.app all should work.

More info: http://blog.chilkatsoft.com/?p=116

Second, Giving Full Trust to a Strong-Named Assembly in a Medium Trust Environment
You send me your order information and I'll send strong-named Mediachase FileUploader.Net assembly and a modification file.

More info: http://west-wind.com/WebLog/posts/6344.aspx