did you enable your map in navit.xml?
you should find all about navit.xml here:
http://wiki.navit-project.org/index....figuring_Navit
but now that i read well maybe someone (dwould?) should update the wiki, the mapset section in my navit.xml start with
<mapset enabled="yes">
and not just
<mapset >
as reported in the wiki.
could your issue be caused by this?