Hi, welcome to B4A!!!
For starters, the name of the language is B4A, maybe your code doesn't work because you are using 4BA
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Another thing, when posting code, please use the [code]...[/code] tags, that makes it look better.
Looking at your code, what do you have in the layout named "Main"? if you have the labels in question then that's the problem, views created with the designer DO NOT need to be initialized.
I understand you've just got B4A, so, I would recommend you read the manuals first, all those "noob" questions will be explained there, you can find the links to the documentation in my signature below.