Which apk did you install?

This APK: Tomtom Map Changer Version 1.5

What about the TomTom apk?

Excuse my English, but I do not understand the question.

You should have installed the TomTom apk and the sdcard files, then the mapchanger apk

What is the difference between tomtom apk and apk mapchanger?

Mapchanger apk is not the TomTom application, you need to install both.
The mapchanger allows you to change between correctly installed maps WITHIN the TomTom application.

I'm sorry for my stupid questions but I just reinstall and it works all except start TOMTOM: Unable to connect TomTom rides must try again later.
Thank you for your patience.

Rushcarbon:
Use Google to search for the a771la apk (I couldn't find it on Navitotal) and the cartella tt a771la. Copy the cartella tt a771la to your device. Then download and install the map of your choice into the folder tomtom\com.tomtom\files, making sure the map is one that is compatible with android systems. Find FastActivate (readily available) and activate your map with it, using option #8 for a771la's Multi map Version. Then install the a771la apk outside of the tomtom folder. Your map should then be active. If you have more than one map on your device, then you may want to use Fatboyfun's map changer. This is a separate apk. Do not install it inside the tomtom folder.
I hope this helps you.

MApChanger V1.5 works perfectly on S4 with Android 4.3. The root button, was what was missing in previous versions! Many THANKS!

Does anyone have a link to version 1.5 please?

I will restore the links soon.

O.K, Thanks for the reply it's much appreciated. Having upgraded from my Galaxy S1 to an S4 I find that version 1.4 no longer works.

Bump! Files re-added...

Many thanks for the new link.