I don’t have enough points to comment.
First off, as others have said we can’t recreate this since we have no idea what your Form looks like or what you are expecting it to do.
Secondly, you should turn on Option Strict in the Compile section of Project properties to avoid technical errors like ProgressBar2.Increment(0.6) since 0.6 isn’t a valid integer.
I threw together a TabControl (which you never mentioned in the OP) with 3 tabs and the various buttons and progress bars you list in what seemed like a logical fashion to me and it ran just fine for what code you have. Clicked the button on each tab and each progress bar eventually got to 100%. I have no idea what else you were expecting.
solved why wont this visual basic script work?