Then you have problems other than the voice file or skin.
I can assure that all functions are vocalized in English with the voice file I posted, but nobody can know what other file or setup issues you may have (wrong iGo version, wrong data.zip, etc).
I would suggest:
1) delete your 'save' folder and start over with the program setup and see if that has any positive outcome, or
2) start completely over with a known working current iGo version, or
3) if your missing functions ever worked, revert back to that setup (skin version, etc)
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