Can not connect two wireless PCs (but 1 is ok)

[chifu]

I have Belkin 54g ADSL modem wireless router. 1 Belkin 54g USB adaptor and 2 Safecom 54g USB adaptors. 2 PCs running Windows 2000.

I have configued the router and USB adaptors and with 1 PC switched on it works very well. But when I switch on the second PC, the first PC carries on working, but the second PC keeps trying to establish a link then says the cable is unplugged. It will keep trying this again and again.

I have tried various combinations of the adaptors and each time the first PC to switch on works (it can be either PC) but the second keeps dropping. Once in a while I can get both PCs working on the network but not very often.

Has any one come across this behaviour before and found a solution?

I am using DHCP and WPA-PSK and MAC address filtering. Have tried turing DHCP and MAC address filtering off.

 

[bcastner]

This behavior sounds strongly like two PCs trying to use the same IP.

Be certain there are no static IP assignments, or that they are completely unique. Check the manual - many routers dislike a static IP assignment made within its DHCP scope.

 

[chifu]

I have found that switching the router off and back on allows both PCs to connect ok. It seems to me that when I switch a PC off the router does not know that the PC is no longer connected and when I try to reconnect, it refuses the reconnection because it thinks there is a duplicate machine. Have set the router to clear DCHP leases after 30mins but router still shows the switched off PC in the client list after that time.

I have moved the DCHP range up to 100-110 just in case there is another machine that is messing my router about but unlikely.