nextgen tts pro

i ahve been trying to get tts pro working on nextgen for about a month now and just cannot get it to work.it will say turn left or right and tell me which exit to take on a roundabout but it will not announce street names! has anyone got this to work? can someone tell me which files go where and point me in the direction of the files i need.
nextgen looks good but it is really annoying that i cannot get this to work
any help would be very much welcome
thanks
dave

What type of device, what OS & version (Android or WinCE and what version), and what version of NextGen are you using?