fedora 12 beta liveusb creation fail

[Nyan]

Hi all, I downloaded Fedora12-Beta-i686Liveiso and used liveusb-creator to install it to 2GB usb drive.
This is the error message that i got.

F12-Beta-i686-Live.iso selected
Verifying filesystem...
Verifying ISO MD5 checksum
ISO MD5 checksum passed
Extracting live image to USB device...
Wrote to device at 2 MB/sec
Wrote to device at 663 MB/sec
Creating 1041MB persistent overlay
Setting up OLPC boot file...
Installing bootloader...
Unable to find partition
LiveUSB creation failed!
Unable to find partition

I've tried more than 2 times and it's the same...
Could anyone help me ?
Thanks!