i had a host of prob's with red hat too.
i had driver problems, dhcp problems(which still arnt fixed) and problems seting modes and all that stuff. i installed the latest wireless tools package, and installed the latest driver for my card (i got mine at linux-wlan.com and mine is working now, though i have to do it all at the prompt with iwconfig, or lvnet for wireless and since dhcp will not work at all, i have to use netconfig, if you just use ifconfig it sets my defulat gateway to 192.168.1.255, but since my defulat gate way is 192.168.1.1 (same ip as the wireless router) i have to use netconfig to set that cause i cant get ifconfig to change the value. so i would say, newest driver, newest wireless tools package (with iwconfig and the like) as well as using netconfig and lvnet to set it up, that way you can control every thing.
Need to know the driver you are using.
Since you mentioned lvnet I am guessing you are using a card with the atmel chip. I have a linksys WUSB11 and I struggled with it under RedHat 9. It worked before I turned on WEP. The driver came from here
After I turned on WEP, I could only get it to work if I hotplugged after boot and used a static IP. I was using version .2.1.1 of the driver. I also hardcoded the key into the source.
I have switched to Fedora core 1 and it uses a different driver. I could not configure it with the GUI but I was able to write a ifcfg-wlan0 file that seems to work. It uses a different driver for the same chipset.
I am not sure which chipset you card has, so I have no suggestions.
i have it working suffiently
my card has the atmel chipset init and im using the drivers from lwww.inux-wlan.com, im using the driver .2.1 fromthe site, it seems to work just fine like i said, aside from not being able to configure it graphicly, though i do have to et the address staticly as well. i'm on redhat 8, not 9, but i think i'll give those drivers from source forge a try on my laptop. maybe they'll get more of my card working.