With the announcement of the Motodev core plugins being included in the AOSP tools (http://developer.motorola.com/tools/motodevcoreplugins/), I have been trying unsuccessful
Look at the errors, they provide information about the tools you are missing. After I've gone through the motodev tutorial, I had to install Web Service Tools, Database Tools (DTP) and Memory Analizer Tool (MAT). Also, Leoa is right, for people using windows, stick with win32, even if your windows is x64.