[ubuntu] Network card not working

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http://ubuntuforums.org – Hello all, I have installed the network drivers as instructed in .txt file on Broadcom site. My WIFI network gets switched ON. It does not detect any networks. Initially i used to get it properly but when i tried to attach one more adapter card to usb everything changed. I have Dell 3400 Laptop i3 processor. 1. My Brand and model of Wireless card is: 12:00.0 Network controller: Broadcom Corporation Device 4727 (rev 01) 2. Below command does not show any output to me: lspci -n | grep '14e4:43' 3. I am using Ubuntu 9.10 having kernel 2.6.31-22-generic i686 4. I am not using NdisWrapper 5. It (HowTos)