Nintendo dsi menu? error help!

I have an V1.41 R4i and when i click on the menu the loading screen appears and the "menu?" error appears.Help me, please?

Replying to #1

The menu? message means the firmware can't be found, so check you have the right firmware and it is set up correctly.

Replying to #2

I've iserted the "pen drive-flash card thingy" on my Netbook and my menu firmware got deleted itself.