Help needed in updating kernel to 16747

I’ve a 4GB Xbox 360 S, Glitch 2, Corona. I want to update kernel to 16747 cause I’m unable to play the latest games. Here’s the problem I’m facing in trying to do so. I tried dumping nand through Nand Flasher 360 but it gives an error and couldn’t complete the process. Then I tried Simple Nand Flasher though it successfully dumped the nand but when I tried opening it through Xebuild, it gave warning, the size is unknown which means something went wrong, something like that, I continued anyways but then many errors seemed to appear on “Main” section so I decided not to move on to write this nand. So what should I do? I did anything wrong? I’ve no idea since it’s my first time doing so. Help me out.

You sound very new to this sort of thing, and I mean that with all respect! Can I suggest that you watch these videos in the order you need to, they are very helpful and user friendly as long as you do EXACTLY as the user does…

Video #10 and #24 should help!

If your gonna update, go to the latest, 16767.

Are you putting your cpukey in xebuild?

Yes, I’m putting the cpu key extracted from the nand. But the nand I dumped seems not valid considering the errors shown on xebuild.