I have installed the computer voices by downloading and it does not show up when I go to change voices and without being able to choose the computer voice I am unable to have spoken street names. Any ideas on what is wrong. When I check on Tomtom home 2.7 it shows the computer voice is installed but it does not show up in the list of voices. I have tried removing and reinstalling the computer voice but it still hasn't helped. Thanks in advance for any help