My Nokia N9 reboots non-stop. I wanted to change the header title of the feeds with n9tweak. I wanted something like a yellow color, so I looked for the number in the internet. I typed this in the tweak app and than I wanted to reboot the phone. But now it's only rebooting all the time again and again. What shall I do? Do I have to flash the device? (again -.-)

Sorry for my bad english.