zoho api simplexml_load_file error : failed to open stream: Connection refused

zoho api simplexml_load_file error : failed to open stream: Connection refused

I have written code which is working fine on localhost but when i upload the code to live server it's showing error " failed to open stream: Connection refused", I checked server settings like "allow_url_fopen" its ON, "Registered PHP Streams" has value "HTTPS" thats also fine.
    But still its not working, Guys can u please suggest whats going wrong ? Does zoho api has some special server setting requirement ??