Chrono Trigger | Where to save?

I;m playing Chrono Trigger on a Flashcard with the AP-Bypass Cheat...
I've started that Game 20 Minutes ago and currently I'm in the Forrest doing some fights., but where the Hell do I save? In the Menu it says: "You cannot save at this time"WTF?

You can save at save points and at the world map only. If you step outside of the forest to the world map you can save your game.

How easy, thanks!