[Help] problem with network starting and stopping

Hello .
I'am having problem with my broadcom wireless adapter which is that when im trying to connect to a network using wicd the computer will be lagged for about 2 minutes then it tells me bad password ( after trying to validating authentication ) .

and also when i try to use command etc/init.d/networking (start/stop) its the same problem.

by the way when im using eth0 (wired connection) it works perfectly so the only problem with wireless.

Thanks for reading, i hope you help me.

extra info..:confused:
when use lspci | grep Broadcom i get this data
03:00.0 Network controller: Broadcom Corporation Device 4727 (rev 01)

Dunno if this will be any help, but I hope it is!

Here is how I authenticate with my wifi card without wicid (my interface is wlan0). The stuff in CAPS is stuff that needs to be filed in.
Throw this into a shell: iwconfig wlan0 essid NETWORK_ESSID key WIRELESS_KEY_IN_HEX
Optionally, if you dont want to use the hex key: iwconfig wlan0 essid NETWORK_ESSID key s:WIRELESS_KEY_IN_ASCII
Then obtain an ip with: dhclient wlan0
Or just try wicd after that association.