I try to upgrade but it does not work. Board is tiny version from BaseCam web shop.

Pausing monitoring..
Signing request..
Entering boot mode...
Waiting for bootloader to start...
Downloading firmware...
Downloading firmware...
Writing data into file "D:\Program Files\BaseCam\SimpleBGC_GUI_2_43b9\firmware\simplebgc31_v2_56_b9_0123315cb7c4770fee.bin"...
Firmware is downloaded: 131072 bytes
Writing firmware...
Writing firmware...
dfu-util 0.8
Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2014 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org
Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!
Cannot open DFU device 0483:df11
No DFU capable USB device available
Process finished.
Error upgrading firmware: Error writing firmware: [74] No DFU capable USB device available

Any ideas??