Ad-Hoc network essid issue

[Ziffer]

hi,
     When I try to create my ad-hoc network on my Ubuntu 8.04, I can not to set the essid of the ad-hoc network that I create. 
when I input  "sudo iwconfig rausb0 essid "adhoc-network" and restart it.    I still get following:

lo        no wireless extensions.

eth0      no wireless extensions.

rausb0    RT73 WLAN  ESSID:off/any  Nickname:""
          Mode:Ad-Hoc  Frequency=2.412 GHz  Cell: 62:60:60:60:60:60   
          Bit Rate=11 Mb/s   
          RTS thr:off   Fragment thr:off
          Link Quality=0/100  Signal level:-121 dBm  Noise level:-115 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
Also, when I insert my D-Link DWL-G122 C1 into my PC, something strange  happens. If I press any key on  the keyboard, It appears many of it. For example ,  I press 'a' , I get "aaaaaaaaa".
Can any body help , thanks!



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