VB6 - Windows 10

I can set up the Winsock control to receive incoming connections from a web browser when the my IP and Port that I've opened is entered into the address bar. My program can see what is being requested (i.e.; "http://555.555.555.555:22332/request". The problem is that I can't seem to get Winsock to send a message.

I've tried

Code:
Winsock(index).SendData "Hello"
and

Code:
Winsock(index).SendData "<html>Hello</html>"
but the browser only comes back with

555.555.555.555 sent an invalid response.
ERR_INVALID_HTTP_RESPONSE


Any help here would be greatly appreciate. Thanks!