The toolkit 1.6.2 does not work with Android version 4.2.2. It requires new fastboot and adb drivers. They are available here
Download that zip and extract/unzip its contents into the toolkits/data directory and agree to overwrite those files, then proceed to use “Any Build” mode to root.
The tool kit uses scripts to execute adb and fastboot commands. Without the updated drivers, rooting isn't going to happen.
Sent From my Dual-boot Razr Maxx (RaZR3Ds.JB.ROM.FiNaL.v3-R3Ds) via Tapatalk 2