The problem you are experiencing does seem like a pathing issue. Here are a couple of things you can try, you can test the file by moving it to the root of the site, then adjust the links in the iRite code on that page. This will help to determine if it is the location of the page in relation to the paths it is using that is the problem.
The next thing you can test would be to place a copy of the iRite folder inside of the directory that the file exists in, then adjust the paths accordingly. I did some checking for the files based on the URL you provided earlier and it seems that the files are in the correct place.
Please report back with your results, if you are not able to get it cleared up this way I will submit a support ticket for you.