aoe-flush is not working in ver 30

[-None-]

aoetools: 30
installed aoe driver: 47q
running aoe driver: 47q

only aoe-flush -a working properly
aoe-flush [device name] does nothing

root@aoeslave1:~# modprobe aoe
root@aoeslave1:~# ls /dev/etherd/
discover e0.1 err flush interfaces revalidate
root@aoeslave1:~# aoe-flush e0.1
root@aoeslave1:~# ls /dev/etherd/
discover e0.1 err flush interfaces revalidate
root@aoeslave1:~# aoe-flush e0.1
root@aoeslave1:~# ls /dev/etherd/
discover e0.1 err flush interfaces revalidate
root@aoeslave1:~# aoe-flush -a
root@aoeslave1:~# ls /dev/etherd/
discover err flush interfaces revalidate

This has been fixed in the new version of the driver, I checked.
actual driver and utility version here http://support.coraid.com/support/linux/aoe6-83.tar.gz