Cheat Engine

[Pyroflame]

I took the pointer tutorial at least 4 times now, and I can easily get it to work in the tutorial, but for some reason in this game called Tank Ball, using the Fire Fox browser, I can't get it right.

I find the value I want to hack. (Health)
I find out what writes the value
I found out what would probably be the pointer needed to find the address
I ticked the Hex box
I scanned for the pointer
Then no result showed up

I double checked everything, and like I said, it worked fine when I did it in the tutorial all 4 times.

The game is here:
maidmarian[dot]com/Tank[dot]htm

Your starting health is 10, it goes down by 1 each time you get hit. Does anyone have an answer to why I can't get this to work?