I use Ozi and Lowrance also. I just had to keep changing units in the "configure" page until it started working but I'm sure you've already tried that. You could go to the Ozi website and see if there is an update for your version. If you've already updated Ozi, that might be why it won't work. Had that happen one time and had to go back to an older version of Ozi that I kept on disc. I know they're constantly updating that program. Sometimes it's better and sometimes not.
The only way to have a good fishing spot is to make it yourself!