Hi, I really need help in installing MFM map to Garmin USA Version. This is what I did, change gmapsupp to gmapprom and transfer to ../storage-usa/.system. Change the permission correctly. Open Garmin, map loaded correctly. However, I've encountered the following problem

1. When searching address, the app crashes and bring me back to springboard
2. No voice navigation. No audio data found when go into setting, audit & display, navigation voice, it show "none"

Any advise would be very much appreciated.

Thanks