Create comment.php

I feel so embarrassed posting this after I saw all your work today. However, after hours of work I have a code that will not work for me. I even just tried creating a form to post like I did in my last homework, and it won't work. This is code I made with the help of a video tutorial. It is not recognizing name, comment, submit from the post in the php. Also, the bottom php is saying that fetch_assoc needs two parameters. 
Finally, it won't update the database either:(
I have my code working perfectly here @ http://codd.cs.gsu.edu/~csc4370SU14_05/YourList.html , but it is not working in this one. I even tried the code several times on codd, but to no avail. I will be back tomorrow afternoon...