Logic 8 - Sync is lost after update, usb conflict?

[szabochristian]

I have been using the analog outs via midi in Logic 8.
My gear is synced with a master word clock and the virus (and other) analog outs run into preamps and firewire back to computer.
I haven't been doing much music lately, so I am not sure if this issue really started with the software update.
When I installed the update a pop up warned me about a possible usb conflict, but I quickly disregarded it and now I don't get the screen anymore and I forgot what it said exactly.
I know that I share the usb plug with some hard drive/memory card reader and I just simply don't know how to "reset" or uninstall the unwanted usb device(s) so that only the virus would use it.
This may be a Mac fix, but I looked all over the net and found nothing useful.
Thank you for your help!