SPA 2.0 (Server Performance Advisor) : No report

[Olivier MATROT]

Hello,
I've successfully installed SPA 2.0 on a domain controler to troubleshoot
Active Directory issues. But, the tool fails to generate the report after
data collection.
The current report view show the following error message :
"This report does not contain useful information due to a bad data
collection. Please refer to the help for more information."

However, I've found a file named "incomplete_report.xml" in the report
directory...
There is information neither in the help file, nor in the windows logs.
I've used Process Monitor to check for denied access. Everything is fine
though.

Any Help appreciated.
TIA.

Olivier MATROT.