How to make a text box update?

Hello. I am trying to make server music player GUI. The problem is the text box, where a player enters the audio id is not updating. What I mean is, when I press play audio, it tries to play the default text box text that I had set.

eyy = script.Parent.Parent.TextBox.Text
script.Parent.MouseButton1Click:connect(function()
game.Workspace.Sound.SoundId = ('rbxassetid://'..eyy.Text)
game.Workspace.Sound:Play()
end)

I get this error "Sound Workspace.Sound Failed to load rbxassetid://Enter Audio ID here"

That is the script I have right now. Please tell me what's wrong with it, and how to fix it.

Thanks