Have a new Nokia 5230 – the Maps application was working fine and now get this on the PC OVI:

Cannot find maps or voice guidance on your devise.

This is due to either of the following reasons:

Your device does not support the Nokia Maps application

The maps and voice guidance files are corrupted

OK then went to help and deleted the files as advised:

If you see a notification in Nokia Ovi Suite Maps that your device's maps or voice guidance files may have been corrupted, switch the device's USB mode to the mass storage USB mode. Then, from your device's  memory card, look for a folder named Cities and a file named qf, and delete them. After that, switch back to the PC Suite USB mode. Refer to the user guide of your device for more detailed information on selecting or changing the USB mode.

Still no joy – can anyone out there help please!