Still no handshake on Linksys router

[aqu32]

In my previous post I said that I tried to break my 2 networks:

This is very weird and I have no more ideas how to resolve my problem. Today Ive tried to broke two networks with PSK keys active on their security. On one I gave WPA2 AES and on the other one I set up WPA TKIP . For cracking procedures I used Alfa AWUS036H (500mW) and backtrack 3 on VMware machine. There was no problem to get a handshake (and then password ofc) from AES-secured network on my Edimax router, but I wasnt able to get a handshake from Linksys router (with WPA TKIP security) on "DeAuth mode". And of course everytime when I sent a DeAuth packet I got an info like:
"Sending 64 directed DeAuth STMAC: [] [3/15 ACKs]" with simmilar numbers of responding packets and ACK's. There were quite good signals in both situations. PWR rate was about 35 on Linksys and 25-30 on connected client and about 50 on Edimax - 40 on client (Routers are located on different floors in my house).
I've tried to check .cap files with Wireshark and then i realized some strange thing. I had no get even one EAPOL packet from Linksys router... when I sent DeAuth packet, client just made a REASSOCIACION with the AP without HandShake o_O And it happens every time. Do u know the reason of that and how to get a damn handshake by using DeAuth packet? Does Linksys routers have some different reassociation procedure, couse I have no reason to explain that.

Take a look at wireshark logs :

That was in backtrack 3, so I upgraded backtrack to 4 R1 version, but it hasnt changed anything except that now when Im disconecting the client I get:
Sending 64 directed DeAuth STMAC: [] [53/63 ACKs] (and simmilar very high numbers). But still somehow there is no handshake at all !!
Every times it looks like here:



There is Authentication request then response, next REassociation request and response... all time without 4-way handshake, there is no even 1 EAPOL packet !
What is the reason of that? Does Linksys has some different association procedure? Or I have to do smth else ? I havent seen anything like this before so Im very interesting about your opinions

[aqu32]

I found very simmilar topic on Italian Community :

http://translate.google.pl/translate?js=n&prev=_t&hl=pl&ie=UTF-8&layout=2&eotf=1&sl=auto&tl=en&u=http%3A%2F%2Fwww.backtrack-linux.org%2Fforums%2Fangolo-wireless%2F33843-handshake-linksys.html

It seems that some Linksys routers have implemented code which protects packet transmission against attackers using DeAuth to get a handshake. Good reason to buy them if u wanna feel a bit more safe