Error Al cargar apk el cambio de pantalla me friza la app

todo funcia en el emulador pero cuando instalo el apk abre y al cambiar de pantalla se me friza y manda a vovler a cargar pero se friza todo y no carga la aplicacion quien me ayuda pork no me pasa con la primera que hice

Send an image of the blocks that make the Screen change.

there is from bottom to top screen1 and screen2

when it is installed normal it opens normal and when it does the screen change it frizzes

If the lblNumbero is equal to or greater than 100, the Radio screen continuously opens and the app is blocked.

Try set Timer Enabled = false, before abrir otra pantalla Radio

something like these blocks that work for me which is from the first app

before switching screens stop the clock and use the recommended method of switching screens
The recommended method of switching screens in App Inventor

Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun.