WSAEACCES An attempt was made to access a socket in a way forbidden by its access permissions

Question:

Do you have any idea what I could do to get around the following error that is generated by Chilkat DLL?  I have verified that I can run PHP scripts (i.e., version()) through the port 3017 in localhost, so IIS and PHP are configured properly.  The lcUrl = loOauth2.StartAuth() function call kicks up the WSAEACCESS error.  I can see with netstat that port 3017 is listening, and I have tried temporarily disabling any virus software and windows firewall, and I made sure our Cisco firewall hardware is configured to allow port 3017 communications.

This is the error:

ChilkatLog:
  StartAuth:
    DllDate: Aug 25 2018
    ChilkatVersion: 9.5.0.75
    UnlockPrefix: Anything for 30-day trial
    Architecture: Little Endian; 32-bit
    Language: ActiveX
    VerboseLogging: 0
    bindAndListen:
      port: 3017
      backlog: 5
      listenOnPort:
        SocketError: WSAEACCES An attempt was made
to access a socket in a way forbidden by its
access permissions.
        Socket bind failed.
      --listenOnPort
      listenPort: 3017
      Failed.
    --bindAndListen
    Failed.
  --StartAuth
--ChilkatLog_

Answer:

Port 3017 was being used by some system service, but 3018 worked, and I got the access token.