Game running, but it doesn't save

[RyuuB]

Hi guys.

I'm new here. Nice to meet you all.

So, I've just installed this game - [101029][Pulltop] Lovekami | 恋神 -ラブカミ- - And it's running normally, except for one detail.
It does not save.

There is no error message and the game runs normally, but if I click on a save slot nothing happens.

I'm using the no-disk patch that came with it.

I even tried using a virtual disc mounting-thingy, but it didn't work.
I tried without the patch, but it asks for a serial key.

I wonder if I can fix this?
Or maybe it's a patch limitation?

Thanks in advance!