Hey Fahad,
You might want to check out Jean's wireless page first and read up on it a bit more
http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/
but if you dont have any luck there then post back the outputs from
ifconfig
iwconfig
and from the ifcfg file which should be under
/etc/sysconfig/network-scripts/ifcfg-eth1
The last part (ifcfg-eth1) might be ifcfg-wlan0 or something else. If you have multiple ones just post them all.
Cheers
Chris