Ok I see your devices seem to be a bit more basic than the usual stuff from China :(
@Adrix000 : the specs of your device are fine and Garmin should run just fine.
It is possible that you have some corrupted files in your map ,if you can try to download it again or better from a different source.
@heriadi : ok, usually it should be mentioned somewhere on the device or the packaging, but we will see what we can do.
If all other programs work fine than it might be that some DLL files are missing on your device that should be included in a normal CE install.
Not sure if that helps you but it should be possible to run the total commander directly from your menu - just like the GPS software.
With it you can search your SD card and start all programs manually and might have a chance to see an error message.
I think I have to upload a menu for these 800x480 devices soon with the basics included...