iWeb Podcast troubles

I recently uploaded a podcast page I created on iWeb to my own web hosting service (not .mac). Unfortunately, the podcasts won't work once I get them on the web. The quicktime symbol comes up with a question mark on the middle. I tried it on several different computers with the same result.

The weird thing is, if I open the webpage from the iWeb folder on my computer, the podcasts work fine. I only get the mysterious question mark once I've uploaded them to my web server. Try out the link here.

I ended up re-encoding the .m4a files to .mp3 files, putting them on my Classroom 2.0 page, then linking them here., Mp3 files don't allow you to see the pictures though and it really takes away from the podcasts.

Any help is appreciated.