SEO Friendly URLs / ISAPI Filters

Hello everyone!
I have a question about "SEO Friendly URLs / ISAPI Filters"...
I did all points in manual of the SEO Friendly URLs and did make a Espace Alias than worked perfectly but in Service Center, sometimes appears a message error.
It's normally?
I attach printscreen of the error than appears in service center.

Best Regards, Paulo Torres
Was this isuue resolved by anyone? does anyone know how to get around this? having the same problem... :(