[Ntop] port mirroring question

[loic]

hi, I monitor a network node, with ntop 2.1.55 which is connected on the mirrorred  port. My problem is that I don't get any more the precious informations of : "usage" "sessions" and "matrix". When i'm an a normal port I get all of the informations. Is there any solutions to get all of the informations when I sniff on a mirrorred port ? Thanks again for your time,  regards