No such Alternate Setting: "u-boot"

[simon]

Hi there,

i'm having trouble with the following situation:

I want to use Qi and I'm following these instructions:
http://wiki.openmoko.org/wiki/Qi#Installation

But I'm ending up with always the same error:

===================================================================
sudo dfu-util -a u-boot -R -D 
qi-s3c2442-1.0.2+gitr3b8513d8b3d9615ebda605de4bda18371aa3f359.udfu
dfu-util - (C) 2007-2008 by OpenMoko Inc.
This program is Free Software and has ABSOLUTELY NO WARRANTY

Opening USB Device 0x0000:0x0000...
Claiming USB DFU Runtime Interface...
Determining device status: state = appIDLE, status = 0
Device really in Runtime Mode, send DFU detach request...
Resetting USB...
Opening USB Device...
No such Alternate Setting: "u-boot"
===================================================================

Would be quite nice if you could help me or give me a hint!

Thanks a lot.

Simon