I can find() but can't save(), why?

Hi,
I have a BIG problem because as the title says I can find() but can't save() and not understand where the problem is. This the code: http://pastebin.com/VNYSh5j3, can any help me to find where the problem is?

Cheers and thanks in advance
Ing. Reynier Pérez Mira
Cel: +58 416.921.7406
Correo: reynierpm@gmail.com / reynierpm@hotmail.com

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