SetupPsychtoolbox filepath error

I am trying to run SetupPsychtoolbox to get PTB running on an additional machine to the one that I am already running it on (I can’t do the regular download method since the machine cannot connect to the internet) and It is coming up with the error stating “You need to change your working directory to the Psychtoolbox folder before running this routine!” I already changed the target directory to the PTB folder though so I don’t know if there is another place that I am supposed to write in the filepath, or if I am using the wrong filepath. Any help would be appreciated

Windows XP
MatLab 2015a - 32bit
Psychtoolbox 3.0.11

The PTB folder is the root of a complete unpacked PTB folder structure, so the folde contsining setuppsychtoolbox. Is that your cwd? Check also which setuppsychtoolbox, perhaps you have another copy elsewhere