Open Virtual Machine using Applescript

I am trying to open Parallels then open a specific virtual machine. The following script opens parallels selects the menu item which shows a dialog box with three VM’s in it. I cannot figure out how to select one of these. I have tried counting the names but that returns error 1728.

tell application "Parallels Desktop" to activate
delay 5
tell application "System Events"
	tell application process "Parallels Desktop"
		tell menu "Window" of menu bar 1
			click menu item "virtual Machines List"
			set theName to items of menu item "Virtual machines list" as text
			display dialog (count items in theName)
		end tell
	end tell
end tell

I note there is a reference in results to application process “prl_client_app” which I have not seen before

TRied to open the actual file once parallels was running using the finder but that does not appear to work. any suggestions very much appreciated

Thanks

Model: iMac 27
AppleScript: 2.5(138)
Browser: Safari 536.26.14
Operating System: Mac OS X (10.8)