Cepstral Community

I use the text-to-speech abilities in Ventrilo and I have also recently licensed the "Lawrence" voice since I wanted a bit of a choice of voices. I have found that while I am able to hear the "Lawrence" voice myself after choosing it in the drop down menu, no one else is able to. Instead they hear the default voice given in Ventrilo. I have gone as far as changing the default voice in Windows to "Lawrence" under the 'Speech Recognition' portion of the Control Panel as well as making certain it is changed in the Ventrilo program itself.

Is there something I am missing or is this simply how it functions? If this is a case of the latter, then I would be sorely disappointed as I would want others to be able to hear the voice I have chosen to represent myself and not just the default voice everyone else has.