[SATLUG] unable to surf the net

[scs at worldlinkisp.com]

i got my wireless card working w/ ndiswrapper, i can
join my own network an get an ip address but i am
unable to surf the net, sometimes it lets me but most
of the time it doesn't. can anyone help me. has anyone
run into this? my card its a broadcom 1390
-------------------

  From the CL enter  < iwconfig  >  then check the
  results and see if they match your configuration 
  settings. Your mode, frequency, and ESSID are the 
  important parameters. 

  example:

  <iwconfig>
  eth0 IEEE 802.11b  ESSID dd-wrt  Nickname lou
  Mode: Managed  Freq: 2.437 GHz   Access Point: 
  xx.xx.xx.xx.xx.xx
  Bit Rate: 2 MB/s  Sensitivity: 1/3
  Retry limit: 4  RTS thr: off  Frament thr: off
  Encryption key: off
  Power managment: off
  Link quality=50/92  Signal Level=44dBm  Noise= 94 dBm
  Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
  Tx excess retries:0  Invalid misc:0  Missed beacon: 0