My iPhone home button no longer works

Recently I dropped my iPhone, breaking the screen, so I had that replaced with a new screen by myself that I brought from Amazon.
Now that I replaced it, the iPhone home button doesn’t work at all because when I press it, it doesn’t do anything, no matter how hard or many times I press it, it still won’t do anything.
Later on, I took apart the iPhone and replaced the home button with a new one, and this didn’t solve the issue and yet I don’t know why it doesn’t work at all.
I have pictures of my iPhone 3GS, hopefully it should help or whatsoever.
How can I get the home button working again?
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Answer #1
Try using this tutorial..
http://www.ifixit.com/Guide/Installing-iPhone-4-Home-Button/3144/1
Maybe you missed something..
Answer #2
I have an iPhone 3GS, not an iPhone 4, the tutorial wouldn’t be suitable for it, won’t it?
Answer #3
ND replied: I have an iPhone 3GS, not an iPhone 4, the tutorial wouldn't be suitable for it, won't it?
This is disassembly
http://www.ifixit.com/Teardown/iPhone-3GS-Teardown/817/1
And this is video tutorial on HOW TO REPLACE HOME BUTTON on 3Gs
http://www.youtube.com/watch?v=Een7WQ8fMMM
Also watch this..
http://www.youtube.com/watch?v=783pRXMeV3I