Problem with my GUI/Container

[TheBigJohnny]

Hello guys, I have a problem with my GUI for an Electric Furnace...

 

When I click the block, my GUI opens perfectly. But whenever I try to move my items, they start changing slots in a strange way (I don't think its random) and I can't pick them up. Where should I look in my code in order to find the problem?

 

I would appreciate very much some help, thanks!

[TheBigJohnny]

Sorry for the late answer... here are my things:

 

- For the Electric Furnace:    http://pastebin.com/embed_js.php?i=KVjFskva

- For the Gui itself:              http://pastebin.com/embed_js.php?i=p7NEV8FA

- For the Container:            http://pastebin.com/embed_js.php?i=JbwzkDKm

- For the GuiHandler:          http://pastebin.com/embed_js.php?i=Q0JcKEjM

- For the TileEntity:              http://pastebin.com/embed_js.php?i=e1NpEh1f

 

Thanks in advance!

[TheBigJohnny]

Thank you so much!

[TheBigJohnny]

Sorry to reply again... but will I have problems if I make the  "onBlockActivated" this way?

 

http://pastebin.com/embed_js.php?i=FyQxTTen

 

The rest of the code remains the same. Thanks in advance!