Did you download the zip files and read the article here
i00 Spell Check and Control Extensions - No Third Party Components Required![
^]?
You should ask the question in the forum at the bottom of the article page. As I recall, the author does answer questions there.
I have not tried using it myself. I checked the article and it looks like you have followed his instructions, but without seeing your code it's difficult to say for sure.
Soren Madsen