Quartus (13 or 12) on Ubuntu 13.04 64 bits - device go constantly offline

Hi,

my Quartus II is able to recognize my device. If I go to Tools -> Programmer, select my hardware, the .sof file and click start. It works. However, If I go to Signal Tap II and try to download my bitstream on my hardware. It fails. It normally doesn't recognize my fpga but if i unplug and plug it back, it recognizes.. however It fails to download the bitstream? Any idea?

what I'm seeing in my log:

Jul 20 10:11:43 deathstar mtp-probe: bus: 3, device: 7 was not an MTP device
Jul 20 10:13:00 deathstar kernel: [ 1539.370761] usb 3-2: USB disconnect, device number 7
Jul 20 10:13:07 deathstar kernel: [ 1545.915426] usb 3-1: new full-speed USB device number 8 using xhci_hcd
Jul 20 10:13:07 deathstar kernel: [ 1545.932715] usb 3-1: New USB device found, idVendor=09fb, idProduct=6001
Jul 20 10:13:07 deathstar kernel: [ 1545.932728] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jul 20 10:13:07 deathstar kernel: [ 1545.932736] usb 3-1: Product: USB-Blaster(Altera)
Jul 20 10:13:07 deathstar kernel: [ 1545.932743] usb 3-1: Manufacturer: Altera
Jul 20 10:13:07 deathstar kernel: [ 1545.932748] usb 3-1: SerialNumber: 8D8434794952
Jul 20 10:13:07 deathstar mtp-probe: checking bus 3, device 8: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-1"
Jul 20 10:13:07 deathstar mtp-probe: bus: 3, device: 8 was not an MTP device


my udev rules:

# Altera USB-Blaster rule to set mode to 666.
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="09fb", ATTR{idProduct}=="6001", MODE="0666"