Just to check, are you really using Nokia 6230 or Nokia 6230i, because there is a difference between them, 6230i is the model that has 2 modes in USB usage, the PC Suite mode and mass storage mode that allows you to view the memory card content from PC.
The USB mode question should pop up in phone screen when you connect the phone to PC, but if you get this strange message in PC when using Nokia 6230, there might be something wrong with the USB driver installation.
I can try to help you further, but please confirm the Nokia phone model first.