I guess either you haven't re-loaded the voice files or named them back after the conversion. Check in the unit root for folder named 'Voice'. It should have the various *.vpm files in it, both non-TTS and TTS e.g. English_American_.vpn; English_American_Jill.vpm; English_American_Jack.vpm; Francais_Canadien_Julie.vpm; Francais_Canadien_Felix.vpm etc. If you don't have them connect to WebUpdater and download what you need from Garmin. Check you have Text and Keyboard files on-board too.