Why do all my USB-ports crash after launching Logic Pro 9?

Hello everyone,

i just received my new rMbp 15" today. I installed Logic Pro 9 and everything worked fine. I installed the driver for my external sound interface Focusrite Saffire 6 USB. I'm able to use this external drive for my general audio output on the macbook, but when i start Logic and choose new project, suddenly all my USB ports crah. I mean all of my connected devices just lose the connection. I just have the external interface in one of the usb ports and a usb mouse in the other Usb port. When i try to unplug and replug the devices nothing happens. I have to reboot the macbook to get the usb ports to work again.

What could be the problem?