App don't show any changes after deploy to simulator

I am new to blackberry and I am developing an app.

Suddenly it does not show any changes in the simulator as i change my code.

My cod file size 256 kb.

What should i do to correct this problem?

As I add n开发者_如何学Cew class to it, jar and other files get automatically deleted.

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Also remember to look into console (Alt+Shift+Q, C) for any errors.