Ok I am running into a problem. I followed all instructions on the tutorial of the ZC. However I am having problems having the one-way shutters not working for me.

I checked that My level is 1, The type is NES Dungeon.

What it is doing the shutter door wont open when all enemies are killed. I tried doing a push block and you hear the secret chime when pushed but the shutter won't open.

Is there anything I am missing or am I setting up things wrong?