i6000 - Cannot See or Connect to any Wireless Networks

I am using a Dell Inspiron 6000 with Windows Vista SP1 and am having trouble connecting to a wireless network because the computer cannot see any networks. I know the network is working fine because other computers are connected to the network, and it works when I am connected with an ethernet cable. When I disconnect the wire, however, the computer does not detect any wireless networks. I have tried resetting the network adapter, but that didn't help.

My network adapter is the Intel Pro/Wireless 2915ABG (driver 9.1.1.15). I am not sure if I have the latest driver version because Dell does not list Vista drivers for the i6000 - only XP drivers.

Also, the wireless card is enabled (Fn+F2). I used to be able to connect to wireless networks without a problem...

Any help would be greatly appreciated. Thank you so much for your time!
-Isaac

BTW, I already downloaded and installed the Intel PRO Wireless 2915ABG Vista Driver (9.1.1.15):

http://downloadcenter.intel.com/Deta...rsion&lang=eng

I've been using Vista for over a year, and haven't had problems with the wireless internet. I did upgrade to SP1 a while ago, but don't remember any problems following the upgrade. I could be mistaken tho. The Device Manager shows no yellow/red arrows next to the wireless adapter and it says that the device is working properly.

if it helps, i have pinged the router (192.168.1.1) successfully (4 sent, 4 received, 0 lost), but when i run ipconfig, it says "Media Disconnected" under the wireless lan adapter settings. Here are the ipconfig settings:

Windows IP Configuration

Wireless LAN adapter Wireless Network Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : austin.rr.com
Link-local IPv6 Address . . . . . : fe80::e9ea:b2f9:6ab:28cd%7
IPv4 Address. . . . . . . . . . . : 192.168.1.103
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1

Tunnel adapter Local Area Connection*:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : austin.rr.com

Tunnel adapter Local Area Connection* 2:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

Tunnel adapter Local Area Connection* 8:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

Tunnel adapter Local Area Connection* 9:
Connection-specific DNS Suffix . :
IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e50:1032:2546:3f57:fe98
Link-local IPv6 Address . . . . . : fe80::1032:2546:3f57:fe98%9
Default Gateway . . . . . . . . . : ::

Tunnel adapter Local Area Connection* 13:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

Tunnel adapter Local Area Connection* 19:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

Tunnel adapter Local Area Connection* 21:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :