Hi,
it seems you database is corrupt. Please do:
1. deinstall the application
2. reboot your Xperia.
3. reinstall the application while useing wireless LAN internet access
4. run the app for a few minutes while useing wireless LAN. This is because to ensure a good data connectivity while updating the databases.
After installation please have a look into the menue -> Status Database. The date of last download should be today and the number of fixes speed cameras in data base must be higher than "0".
If it is "0", please try the instructions written above again.