I need some guidance. I got a Nuvi 255 recently which is a model that should support text-to-speech. It did not contain any TTS voices so I used Garmin Express for updating and getting optional voices in English, but no TTS voice was added (those that do would say 'Says Street Names' in the menu).

So I used a different Nuvi of mine (1240, with working TTS) to copy over the TTS voice .VPM file 'Emily' to the 255. However, Emily does not show up at all on the 255. Same story with other TTS voices. However, non-TTS voices (which are those with a small size like 2MB instead of 20MB) do show up and work on the 255. Garmin Express also doesn't offer anything more after I put those files on the device.

I went to [Only registered and activated users can see links. ] and tried several other voices, only 'VCT' voices (like Voice_BritishEnglish-Kate_VCT__210.vpm) show up successfully on the Nuvi 255 but these are not TTS voices. Some files were .RGN and these also did not work on it when putting in the Voices folder, so I even tried installing them manually using Garmin WebUpdater but no luck. What do I do now?