Re: HTTP Status-Code=401 (Unauthorized) error in LoadRunner ApplicationType:Appian

I have recorded the scripts through loadrunner and while replay the scripts i am getting the 401 error.

While replay it suggests me to provide web_set_user, I used following statement before the specific request.

web_set_sockets_option("SSL_VERSION", "2&3");    
    web_set_user("Domain\\username", "password", "locahost:port");
    web_set_sockets_option("INITIAL_BASIC_AUTH","1");
    web_cleanup_cookies();
    web_cache_cleanup();

Error -26630: HTTP Status-Code=401 (Unauthorized) getting an error while replay the scripts.

Run Time Settings:

Use cusom proxy:Use proxy server details-selected and Use same proxy server for all the protocols-Checked.

Also provided authentication details from the "Authentication" tab

Can you pls suggest.