PHONE ISN'T RECOGNISED...
+ Make sure you have your device drivers installed.
++ If you are using Windows 8 then you need to Advanced Reboot and turn of driver signature verification.
+ Is USB Debugging Enabled and Root Access to ADB level, within Developer Options?
PHONE IS BOOTLOOPING...
+ Chances are you have flashed the wrong boot image or one that isn't compatible. This could be because your run a ROM that doesn't support it or that it's plain and simple for the wrong device. Have a check again and make sure you use the right one.
THIS TOOL DON'T DO NOTHING RIGHT...
+ Check to make sure you can run commands and get the phone recognised using the old fashioned command prompt way. Simple adb devices etc. If this works and the tool doesn't then feel free to post. Just bare in mind I test the functions on a Nexus 4, Nexus 7 & Oppo Find 5 with which the functions have all worked.
//MORE FAQ's when they become an FAQ\\
NEXUS 5 (RED)