1) Check to make sure the database was installed correctly. In the folder "C:\Program Files\Upper Deck\Mantis" look for a mantis.exe and mantis.mdb
2) Make sure the shortcut was installed OK. In that same folder, double-click "startapp.exe" to launch Mantis. If it launches without problem, check the shortcut in your start menu and make sure the "Working Folder" is "C:\Program Files\Upper Deck\Mantis."
See if either of those work
Miki Urban
Upper Deck Digital