Help with DFU Mode

[Sylaix]

Hello,

First of all, thanks for your attention, 

I tried to flash the NEO1973 following the wiki, and everything was
allright until I had to update the root filesystem. As shown in the
wiki, I did  #./dfu-util -a 3 -R
-D ./openmoko-devel-image-fic-gta01-20070728081358.rootfs.jffs2

There is the result :

dfu-util - (C) 2007 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...
Found Runtime: [0x1457:0x5119] devnum=42, cfg=0, intf=0, alt=3,
name="kernel"
Claiming USB DFU Interface...
Setting Alternate Setting ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
Transfer Size = 0x1000
bytes_per_hash=644874
Starting download: [###dfu_download error -110
Error during download


I tried to repeat differents steps from the beginning many time, but i
always got the same 'dfu_download error -110'

thank you for your help