Thanks for you quick response.
I tried to do the process as explained:
copyed the file EnableCharPin.exe into my ppc
(via active sync), turned on my navman,
start BT, look for devices, found the navman gps one, next,
and now when the password screen appears i went to "my documents", clicked on the file, and than the error message 'EnableCharPin' is not a valid Pocket PC application" appears.
I saw a post in the forum about registry key or hack, to enable it,
whithout further information.