9.061 is the latest available NC v9. Your device is not TTS enabled by default. This means adding TTS would not help.
You need a patched NC. Try this:
http://www.navitotal.com/forums/showthread.php?5506-latest-NC-prepared-for-small-and-large-devicesdownload 9.061 (this one is patched and optimized)
Download LoquendoTTS v7 from the same page (just to be shure you use a really working combination)
Download the language you want from the TTS-voices list from the same page (if you dont like german or englishUK)
NOW, you would be able to select a computer voice, but it is still possible that you cant hear it.
If so try the DM patch from the same page.
After all there could still be sound problems (yes TTS could be difficult).
If so try Clear Flash tool from the same page and start again WITHOUT DM patch (restore original file).
NEVER use Home to add voices on a device with disabled TTS or patched NC.