I have allready some experience with backtrack and wep cracking, but everytime you think you got it, it goes wrong

Before I had my friends Alfa and now I have my own, I use Backtrack 2 final (I also did the test with the new modules (ng 0.9 new alfa drivers etc...)

My problem is that I can't get any fake auth with my router.. for testing I configurated my rooter with a WEP 128 ascii key.. but I can't auth.. this is the first time I had this kind of problem :s

does anyone know what's the problem?


edit more info:

I use this for a fake auth

aireplay-ng -a mac adres -h 11:22:33:44:55:66 -e Vanywlan wlan0 -1 0

and it keeps saying auth unsuccesfull...

in the past it has allready worked on this way.. maybe it's my router? but it has to be possible to crack it isn't it?

WEP open,no Mac filter

another strange thing is that the airoscript software doesn't reconize my device.. in the option list I only get eth1 (and that's my centrino) but no wlan0 ...

airodump and airmon are working fine..