EnumerateSecurityPackagesW In

I am trying to solve the following exception. The exception occurs when my
ASP.NET code behind code attemtps to access a remore site using SSL. Please
note that all certificates are valid and the remote site is trusted. Also, my
web site uses a custom HTTPModule implemented in a DLL named Security.dll.
Unable to find an entry point named EnumerateSecurityPackagesW 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.EntryPointNotFoundException: Unable to find an
entry point named EnumerateSecurityPackagesW in DLL security.dll.