Wifi Woes

[namelessone]

I recently obtained a new dsl modem/wireless router for my home network. The two windows machines in my house connect fine, and my ubuntu linux box connects fine, but iwconfig lists it as being a 11Mb/s connection instead of 54

ath0      IEEE 802.11g  ESSID:"ESSID"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:14:95:92:10:D1   
          Bit Rate:11 Mb/s   Tx-Power:18 dBm   Sensitivity=0/3  
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=26/94  Signal level=-69 dBm  Noise level=-95 dBm
          Rx invalid nwid:735  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

Also, I can't get a fourth computer, running xubuntu with a usb wireless adapter, to connect at all. I set the wep key, essid, and frequency with iwconfig, but when I try to use dhclient I get the following error:

No working leases in persistent database - sleeping.

I probably just did something dumb...can anyone help me out?

[flipjargendy]

Do you have any other wifi networks around you? If you do the first thing i'd try is changing the channel your router broadcasts on.

As for your other problem... i don't know as much about networking as i used to.