Hoster LITE - Just purchased and Frustrated

[ghopvm]

Please Help

I just purchased Hoster Lite and sucessfully imported zipped files from the hard drive (DK's). I clicked the "next button" and all the ready files seem to import. I click the exit and find a book ID at randum and click add. After the selected file is added to the window below. I highlight it and click "play". After selecting "play" It says "Error" in the box at the left. The same thing happens with all the other files. What am I doing wrong?