EDITED : My story is quite complicated, but I'll try to show only the most important matters. :roll: Network : 1. my neighbour no1, who's client of internet service and in his computer is connected wired to router in his house. 2.my neighbour no2 has wireless connection to the AP. 3. Me, I've got wireless connection too. We both have got D-Link DWL-G520+ cards (chip TI ACX111). MY ROLE : I'm administator of this network :guns: I changed firmware of my WRT from tofu13c to Thibor15c a week ago . Also I set WEP encryption, instead of WPA-PSK , because on my gentoo linux, wpa_supplicant doesn't support acx111 opendriver (D-Link card). I met my neighbour no2 , who told me that his internet connection is veeery slow. So I went to him and it turned out that he had connected to the other network, which was completely unsecured :rofl: I helped him to connect to ours. The next day he claimed me that he can't keep the connection with AP more than few minutes, then breaks. I started tracking DeviceList through webinterface. That was true, after 8-9 minutes my neigh' was disconnected and then his DHCP lease renewed with new connection. SETTINGS : DHCP is on, with static assigning IP by MAC, there's allowed only 3 clients with adresses : 192.168.1.100 (no1) 192.168.1.101(mein) 192.168.1.102(no2) . He got the idea to connect once more to that unsecure network. There everything was working fine there, he said. I was confused. My neighbour no2 said me that he heard that the order of IPs has meaning in priority of clients. I agreed with him , but it's visible in a huge network with about 100 clients, not in small like this one. Finally I did his request and now he's got 192.168.1.99. However....after that he couldn't have connected !!! Argh..... Recently, I've returned to WPA-PSK. It doesn't helped, but.... my "smart" no2 rebooted his PC, and then... it connected !!!!!! And "baby" keeps it. What was that , people ???? I'm planning set WEP again, but my neighbour is pretty sure, that was my fault, not his computer. How it's possible ? We've got identical wlan cards, settings are the same (I've checked). Any suggestions are very welcome.