Just checking, but by "doesnt (sic) do anything" do you mean the larger program dies silently?

Some of the usual questions apply:

• Are you sure the source file is where you think it is?
  I see several dies in what look like appropriate places (given my lack of knowledge of the specific modules you're using)
• Have you run this under debug?
  Potentially tedious, but often helpful
• a) Are you sure your problem is in the code you posted?
  b) How do you know?
  It's very hard to help if a) is not true; it's easier to feel confident that one is not wasting time, if the answer to b) is known.

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