hi everyone!
I write this message cause I see that other virus users have the same problem...
I have a Pc desktop with i5 8 gb ram and protools 9...otherwise to my ex thing,now maybe I find hte problem...
I have a motherboard,an Asus,that have the optional of usb 3.0...
Naturally the virus ti and the axiom in my case have the 2.0 default USB...
I think that if I install the usb 3.0 option in my motherboard I'm going to create problems...
in these days I reinstall all my set up with protoools 9 and I hope to give you some good news...
thanks for a user that illuminated me 
Federico