Hi,

I have an ASP.NET web application that connects to a web service (the web 
app contains a DLL that connects to the web service). This works fine when I 
deploy it on the Default Web Site on IIS.

However, if I deploy it on a SharePoint website, I get the 
"System.MethodAccessException: Attempt to access the method failed." error - 
the full call stack is shown below. From what I can see, SharePoint uses 
impersonation. Is that the problem?

How do I solve this problem?

Thanks.

System.MethodAccessException: Attempt to access the method failed. at 
System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, 
Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& 
bNeedSecurityCheck) at System.RuntimeType.CreateInstanceSlow(Boolean 
publicOnly, Boolean fillCache) at 
System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean 
skipVisibilityChecks, Boolean fillCache) at 
System.Activator.CreateInstance(Type type, Boolean nonPublic) at 
System.Web.Services.Protocols.SoapReflectedExtension.GetInitializer(LogicalMethodInfo 
methodInfo) at 
System.Web.Services.Protocols.SoapReflectedExtension.GetInitializers(LogicalMethodInfo 
methodInfo, SoapReflectedExtension[] extensions) at 
System.Web.Services.Protocols.SoapClientType..ctor(Type type) at 
System.Web.Services.Protocols.SoapHttpClientProtocol..ctor() 
(call stack of my app)