Demo songs in Korg i30 HD are missing

[KorgPlayer]

Hello,

As stated in Korg i30 manual:

'Simultaneously press the SONG PLAY key and the DISK key. You will enter DEMO mode.'

But nothing happens when I do so.

Otherwise, the keyboard is fully functional.

Do I need to obtain some special floppy diskette with demo songs?

Any idea?

Thanks in advance.

Cheers.