DHCP problems

[Charles Malespin]

Hi all, 
   I am using ndiswrapper for a wireless card and I am having some
weird problems with it.  Every once in a while the connection just
stops and it gives no sign or reason why.  when I try to reconnect
through various methods I get this error   "Determining IP information
for wlan0..... No connection found, check cable?"  so I tried
'dhclient wlan0' and this is the result that I get(well part of it)

Listening on LPF/wlan0/00:90:4b:cd:e5:d6
Sending on   LPF/wlan0/00:90:4b:cd:e5:d6
Can't bind to dhcp address: Address already in use
Please make sure there is no other dhcp server
running and that there's no entry for dhcp or
bootp in /etc/inetd.conf.   Also make sure you
are not running HP JetAdmin software, which
includes a bootp server.
 
What does this mean?  I am a noob so I am just confused as to what
DHCP is, if I need it, etc.  I have no idea how to reconnect the wlan0
after it just stops without rebooting the computer.  I have tried
several methods and none work.  I am running FC3, newest kernel,
ndiswrapper 1.1(anymore info can be provided).  Thanks,
Charles