Android Multitool problems. :( topic

I've installed the android sdk, java, and all the other fancy things I was supposed to, but cannot get Android Multitool to decompile any apk's.
This is the error log it throws out:
The system cannot find the path specified.
'apktool' is not recognized as an internal or external command,
operable program or batch file.
The system cannot find the file specified.

Any help is greatly appreciated, I'm lost as to what I'm doing wrong here.
Thanks,