I don't believe he got an error, or didn't say anything about one.
I *think* the code should be there to set the PKey window's lblErr textField to an error via the ShowError() function. It is my own porting of the flex example code though... It may be of some help once the 3.0 is out with the Flash pro example so that there isn't the possibility of breakage porting the code from the Flex example.
Also I think he may have just reinstalled it on the same computer, not installed on another one, judging from his last email.