Need help no text showing in my text files
 

Hi, my Mp3 player suddenly stopped showing text when i open new files I've added to eBook section. All the old files are fine and any text added to the old previously existing files work. When i open the files up it shows the page number as if the files there, but the only thing showing up on my screen is the background image. The next time i opened the files on a computer to see if they were there it showed messed up text and symbols.
It looks like this player model
I use the computers on the local college campus to add files and the only thing i can think of was that they upgraded all the new computers before the semester started. There's one of the older computers that did let me add new files, but that one didn't let me add files yesterday. any one know how to fix this?

Can you upload a sample text file that WORKS and one that doesn't?

I remember that the text files had to be encoded in a specific format for it to work but if you can upload the file, or even attach it to your post, I'll take a look and see if I can find the difference.

Ok the first file Dancing In A Buffalo Skull is a working file. and the second file The Mess Up to All the Others is one that doesn't show up on screen. and thanks for any help you can give me on this!