Ah yes, I thought that might happen since they both share the same sound names. I would recommend removing the speaker phonemes mod since it's causing the conflict. I've added a little info on the Speaker Phonemes mod to make it more clear that this mod replaces it.
Extra info: The Text To Speech mod was made using the speaker phoneme mod, but I decided to roll everything into one mod for convenience, so the Speaker Phoneme mod has been depreciated. In fact I wanted to delete the speaker phoneme mod to prevent this but the mod portal doesn't support removing mods currently.