Well, I think I found what the hell was causing all my probelms with DWS and everything else.
I reinstalled debian edu etch. Of my two thernet card, only one (the pci) is recognize by the 2.6.18 kernel version, so I installed the 2.6.24 kernel and I have done nothing else. I tested my thin client and it was working fine. (Than I made a backup with partimage :). After it, I got the nice idea to change the network card name becasue I'm used to call eth0 the integrated card and eth1 the pci card and actualy was the viceversa. I modifed /etc/udev/rules.d/z25_persistent-net.rules simply exchangin the names of the cards. I rebooted the computer and the cards got the names as aspected but, after it, my thin client was having the same problems I was reporting: amazing slow, partically blocked. I restored the z25_persistent-net.rules backup and the thinclient is workink fine again!!!! Actualy I haven't run the ltsp-make-client but that's just a lot to me. I lost half of my lever in these days bacause of that. I hope that this can be usefull to someone else and I would like someone explain me why that happens. Thank you ;) -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]

