Navigo Sat-nav Sat Nav- Navigo With Turbo Dog 5 Wont Voice Directions?

Sat Nav- Navigo with Turbo Dog 5 wont voice directions? - navigo sat-nav

Hello I have a Navigo Sat Nav for Christmas and although I follwed the instructions and select your language and voice prompts like, are not you trying to find the satellite to observe while driving IM is a nightmare and I lost it once off's, etc. Can anyone help, please. Thank you cassie