Did you start 4 chrome instances manually prior to run the PVD?
start chrome.exe --remote-debugging-port=9222 --user-data-dir="C:\PVD\1"
start chrome.exe --remote-debugging-port=9223 --user-data-dir="C:\PVD\2"
start chrome.exe --remote-debugging-port=9224 --user-data-dir="C:\PVD\3"
start chrome.exe --remote-debugging-port=9225 --user-data-dir="C:\PVD\4"