Error with music player app

[Dhayananth_J (Hacker)]

HI,
My self Dhayananth​,
I am working in a Dynamic music player app but i get the following error both when i am testing and when I use the apk.

Blocks:
1.Screen1

2.Screen2

Aia file:MusicPlayer(1).aia (386.9 KB)

Thanks in Advance​