Hi there, I've already used the search function but for some reason the forum software only lets me view the first results page and the answers I found did not solve my problems. I've bought a European WRT54GS v1.1 which I upgraded to the latest applicable US Firmware version 4.50.6. Before and after I had a couple of connection problems on my PC which is about 7-10 meters away (two walls between). The configuration software of my WLAN-USB-Stick (NETGEAR WG111GR) says the signal is about 74 percent. I am no expert, but I'd say that should be sufficient. The problem is the Internet connection which is often disconnected or disturbed. Up- and downloads often fail, my ICQ messenger goes regularly offline and sometimes I need to clear the DNS cache of my computer or make a refresh of the Internet connection by pushing the DHCP renew button in the router's status panel. By the way, the router is connected to the internet through a D-Link DSL-360T ADSL Ethernet modem which works as a DHCP server. I already tried a couple of settings on my modem. Lowered MTU and MRU down to 1400 in a couple of steps. I did not notice a change in terms of more connection stability. I also fiddled arround a lot with the wireless settings. They are currently configured as follows: * WPA-PSK * SSID broadcast turned off (turning on, as suggested in some post on this forum, does not change anything) * MAC-Filter enabled * Authentication Type "Auto" * Basic Rate "Default" * Transmission Rate "11 Mbps" * CTS Protection Mode "Auto" * Frame Burst "Disabled" * Beacon Interval "50" * DTIM Interval "1" * Fragmentation Threshold "2304" * RTS Threshold "2304" * AP Isolation "On" I'm not sure where to locate the problem. There are three possible options, but I suspect the router to be faulty, because I also cannot connect my PlayStation-Portable in WPA-PSK mode to it. Does anybody have a clue what the problem may be? Thanks in advance, Thomas EDIT: Just found out on another forum, that WPA-support is buggy in the current PlayStation Portable firmware. EDIT2: I just downgraded my router to an older firmware (v3.37.2). My PSP can connect to it via WPA now. Strange thing.