Playing recorded sounds of configurable piano keys on another screen

MIT App Inventor Help
1

I have been trying to create a customizable piano app in which the sound keys are configured in a separate Config screen.
I have been unable to successfully call the recorded sounds on the keys screen.

Any help is very appreciated!
Here are the blocks on the PIANO screen:

PIANOscreen-blocks
PIANOscreen-blocks796×654 32.5 KB

Here are the blocks on the CONFIGURATION screen:
CONFIGscreen-blocks
CONFIGscreen-blocks1735×1283 299 KB

And here is the .aia of the test project:
Teste_PassarArquivodesomPorTelas.aia (947.7 KB)

2

Make that 2nd Screen a Virtual Screen instead.

When we define virtual screens, we use one 'real' App Inventor Screen (most often Screen1). Screen-sized Vertical Arrangements on it are displayed/hidden as required - they are the Virtual Screens. This is generally a better approach for multi-screen Apps, they share data without having to "pass" it between screens and it also reduces code duplication, making the App more efficient and the code easier to follow if you have to return to it at a later date.

So, instead of separate "houses", virtual screens are "rooms" of the same "house".