Check before the installation of the POI file whether a current Microsoft ActiveSync version is installed on your PC. If not, you can load Microsoft ActiveSync 4.5 for free from Microsoft website.
Now copy the extracted file speedcams.txt to your Clarion in the folder My Flash Disk/Clarion/POI/Speedcam.
Disconnect your Clarion with PC and start the navigating software.
Restart your Clarion MAP and search for a GPS fix. Now, all speed cameras are installed and your Clarion is ready for a safe trip!