BACK & END key stopped working (digitizer?)

[UrbanGlowCam]

I was wondering if anyone knew how to fix this issue.

I was looking to sell my Storm 2 9550 and wanted to get all of the dust out before the sale. I followed some instructions on YouTube videos for doing this.

I removed the top and bottom piece then slowly pried the glass digitizer from the LCD under where the dust was sitting between. I removed all of the dust with a t-shirt and some dust remover. The connector on bottom stayed connected the whole time. I used prying tools the whole time and was careful.

I then put pressure on the corners again for the digitizer to connect to the LCD and everything seemed fine. There is now no dust in the screen and it looks clean.

But the BACK and END keys don't work at all. I can't click them. Anyone have any idea how I can fix this? I don't think I broke anything.