Keyboard / Mouse USB keyboard not typing

So I decided to clean my usb keyboard so I opened it with some screw drivers, little did I kow the re-assembly would be so difficut. There where these little plastic pieces for each key but they where loosly placed on some plastic sheets. I did my best at placing everything and pluged it in.

It won't type now. First time it wasn't typing but then I did something, and it typed again but a couple keys where not, so I reopened, placed and tried again. Now it's not typing at all. I'm on the on-screen kb and when I press num lock and caps lock the little green lights do turn on the usb keyboard.

I've tried uninstallng and reinstalling the drivers many times but it doesnt work. Also, for some reason, 2 HID KB devices appear, and it keeps installing one of them when scanning for plug n play devices, even when it's not plugged in.

So help please, thanks!