Unable to find an entry point named EnumerateSecuri tyPackagesW in DLL security.dll : Server Error

[Sam Fields]

I have found very little regarding the error "Unable to find an entry point
named EnumerateSecuri tyPackagesW in DLL security.dll. ". I have an ASP.NET
Web Service being accessed via SSL. I found a website indicating that if
any of your .dll names are security.dll, it could cause this issue. I
happened to have named the service that -- so I renamed the service's dll,
and it still didn't work.

I decided to start from scratch, and built a test service (namespace
"ServiceHos t") with one method:

[WebMethod()]
public string SayHello()
{
return "Hello";
}

It still does not work when accessed via SSL.

The exception is listed below. Can anyone tell me what's configured
incorrectly?

Thanks!
Sam Fields

Server Error in '/sandbox' Application.
----------------------------------------------------------------------------
----

Unable to find an entry point named EnumerateSecuri tyPackagesW in DLL
security.dll.
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.EntryPoi ntNotFoundExcep tion: Unable to find an
entry point named EnumerateSecuri tyPackagesW in DLL security.dll.

Source Error:

An unhandled exception was generated during the execution of the current web
request. Information regarding the origin and location of the exception can
be identified using the exception stack trace below.

Stack Trace:
[EntryPointNotFo undException: Unable to find an entry point named
EnumerateSecuri tyPackagesW in DLL security.dll.]
System.Net.Nati veNTSSPI.Enumer ateSecurityPack agesW(Int32& pkgnum, IntPtr&
arrayptr) +0
System.Net.SSPI SecureChannelTy pe.EnumerateSec urityPackages(I nt32& pkgnum,
IntPtr& arrayptr) +45
System.Net.SSPI Wrapper.Enumera teSecurityPacka ges(SSPIInterfa ce SecModule)
+57
System.Net.SSPI Wrapper.GetSupp ortedSecurityPa ckages(SSPIInte rface
SecModule) +29
System.Net.Secu reChannel..ccto r() +40

[TypeInitializat ionException: The type initializer for
"System.Net.Sec ureChannel" threw an exception.]
System.Net.Secu reChannel..ctor (String hostname, X509Certificate Collection
clientCertifica tes) +0
System.Net.TlsS tream.Handshake (ProtocolToken message) +51

[WebException: The underlying connection was closed: Could not establish
secure channel for SSL/TLS.]
System.Net.Http WebRequest.Chec kFinalStatus() +674
System.Net.Http WebRequest.EndG etRequestStream (IAsyncResult asyncResult)
+75
System.Net.Http WebRequest.GetR equestStream() +132
System.Web.Serv ices.Protocols. SoapHttpClientP rotocol.Invoke( String
methodName, Object[] parameters) +105
sandbox.webserv ice.servicehost .SayHello() in G:\wwwroot\sand box\Web
References\webs ervice\Referenc e.cs:37
sandbox._defaul t.Page_Load(Obj ect sender, EventArgs e) in
g:\wwwroot\sand box\default.asp x.cs:37
System.Web.UI.C ontrol.OnLoad(E ventArgs e) +67
System.Web.UI.C ontrol.LoadRecu rsive() +35
System.Web.UI.P age.ProcessRequ estMain() +731