First of all, can you play the ripped movies from Zoomplayer directly? If so, let's start from the basics:
In the DB Editor, General tab, make sure that you have filled in the right settings here - Location & Daemon Drive.
In the File Types tab, make sure that you are pointing to the Zoomplayer executable file , have it enabled (white), and iso or whatever video file you want to play is included in the Extensions path. The default command line switch should work off the bat. On mine, I added the /q switch so Zoomplayer would close after the end of the movie. Also take note that Offline and Start tab should show the same as the screenshot below:
Lastly, under the Databases tab, click on Edit and the below screen should show up. Under Items, you should see your imported video titles. Click on one and on the right column, make sure you have the right Parameter (the path to the video file). Notice also on the top right is a tick box if want this classified as an offline movie.
If you still have problems, the guru's here can probably help you over at the Chat forum or IRC. Good Luck !