Speech recognizer stop block dont work using a button

MIT App Inventor Help
1

Hi i am trying to do using the block stop speech after write a text. that the sound of the speak but the button dont work. i dont know why if i follow the instructions to make legacy in false to work you see here my blocks

blocks(68)
blocks(68)1811×1425 303 KB

2

is there anyform to pause the speech recognizer sound?. i see the block stop speech recognizer but i dont know how to use when the speechrecognizer is speaking and pause the speak. anybody can help me?

3

there is the aia

proyectoanim(2).aia (53.5 KB)

4

Use the correct block to stop TextToSpeech playback

image