Virtual Disk Development Kit - failed

Hi all,

i am trying to install Virtual Disk Development Kit on ESXi 5.1 from the address:

VMware vSphere 5: Private Cloud Computing, Server and Data Center Virtualization

But when i start the script, it gives me:

-sh: ./vmware-install.pl: not found

I am logged in as root. Could somebody help ?

Thank you very much

Best regards

Patrik