in arptable rules not [!] rule with interface is not working

Hi,
I was trying to drop arp packets such that only specific interface
should answer the arp requests.
I added following rules in input chain.

-j DROP -i !eth1 -o * -d 10.19.1.102 --opcode 1 , pcnt=0 -- bcnt=0
-j DROP -i !eth2 -o * -d 10.19.51.102 --opcode 1 , pcnt=0 -- bcnt=0

To create these rules I used following commands
arptables -A INPUT -i '!eth1' --opcode Request -d 10.19.1.102 -j DROP
arptables -A INPUT -i '!eth2' --opcode Request -d 10.19.51.102 -j DROP

as packet count suggests these are not matching against any packets.
when I do arping from other machine to the 10.19.1.102 (assigned to
the eth1 interface)
arp requests are responded from eth0 (ip-10.19.0.102).
why the rules are not having any effect.


-- 
Thanks
Pankaj Jain

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