Can Not Connect To Server

Hey everyone......I'm having problems using this ftp. I don't know if it's my server or my information that I'm putting in to connect. Can someone help me PLEASE!!

This is what I put in to connect, and I always get this message when it's trying to connect.

"A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond."

PORT: 21
PATH: public_html/