Hi ,
You made one tiny mistake with the folder.
When browsing to the “mayatools” folder an error is thrown up saying, "this is not a valid “MayaTools” folder! So to fix this I changed the folder name from “mayatools” to “MayaTools” and it works 
There’s now a new error though,
"# Error: file: C:/Program Files/Autodesk/Maya2014/scripts/others/performGpuCacheExport.mel line 561: ImportError: file C:/Users/Dave/Documents/maya/MayaTools/General/Scripts\P4.py line 211: DLL load failed: The specified module could not be found. # "