You have to be specific. If your lab8a.htm or lab8b.htm are staying the same, ...

it could be that you are not using the correct file name (e.g. it could be lab8a.html which is different than lab8a.htm, etc.) It also could be that you have the files in the wrong location, e.g. a wrong folder. Just carefully check, using WS_FTP, that everything is the same on your Web site as it is on your computer. If this doesn't work, give me more specific symptoms or (better yet) come by during office hours or after the assessment, Friday.