[REALLY NEED HELP] Flashtool doesn't allow my Xperia U to flash ROMs/kernels topic

Hi...

I wanted to flash a kernel, so I entered into fastboot mode with the "up" volume holded, and then, the blue LED appeared, but then, it just dissappeared! So Flashtool didn't flash anything.

Again, and again, one time and other, and again.
I get bored and decided to flash the ROM I had in CWM, so I flashed it from CWM and now, I cannot turn on my phone cause it makes bootlogo.
Flashtool still does the same thing with my device when I'm trying to flash any Stock Rom or Kernel.

Please, I need the phone for daily usage and for tomorrow.

What can I do? I can enter to CWM but I don't know more things to do to solve this problem...

Help, please.

:rolleyes:

"Allow USB Debugging?" Keep Popping Up topic

After upgrading to 4.3 on my i535 GS3, I'm now faced with a very annoying new problem. I use easytether pro to tether to my macbook, and now when I plug in the usb it pops up with "Allow USB Debugging?" followed by my computer's RSA key fingerprint, and then a checkbox for "Always allow from this computer".

It doesn't matter if I check the "always allow" because the next time I plug it in, it pops up with the same message again. For some reason it's not recognizing my computer, even though the RSA key fingerprint is exactly the same every time. Even worse, I have to go through this process twice every single time I plug in my usb - once for the usb connected as an installer, and twice when it switches from installer to media device.

I use tethering quite a bit, so this is kind of grinding my gears! Does anybody know what might be going on here? Is it possibly just a mac thing? Perhaps something wrong with my settings?