SignalTap working on Windows but not on Linux

I've done some tests with several USB hubs, but same results...

Now I've got an official Altera USB Blaster and "sudo lsusb -v -d 09fb:6001" shows exactly the same that DE2.

I think I'll contact my clone vendors to ask them to check/correct this. The only difference shown in lsusb between the clone and the original is:

bMaxPacketSize0: 8 (altera) vs 64 (clone)

iProduct and iInterface: USB-Blaster (altera) vs USB-Blaster-ARM???? (clone)

iSerial: 91d28408 (altera) vs 8D8C41695350 (clone)

bMaxPacketSize0 might make the difference. Do you think that iProduct, iInterface or iSerial might have any influence?

Do you want me to go on revere-engineering my clone?

Thanks a lot!