BleepingComputer.com: wireless shutting down

hello,
It seems that my wireless shuts down quite a bit. I have broadcom wireless utility. I will be surfing and then notice my signal is gone. I go to the 2 monitor icons bottom right of screen toolbar and there is a X over them. I then look over at the radio broadcom wireless icon and notice sometimes it has a x sometimes it dosent. So I reset it by using the function and F2 buttons. I then have a sinal once again. It happens alot. Please help.
Thank you Brian-