Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation.  All rights reserved.

C:\Users\JASON>ipconfig/all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : JASON-VISTA
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Wireless Network Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) PRO/Wireless 3945ABG Network Connection
   Physical Address. . . . . . . . . : 00-1B-77-67-53-26
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Broadcom 440x 10/100 Integrated Controller
   Physical Address. . . . . . . . . : 00-19-B9-82-13-0F
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 192.168.1.3(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Monday, July 16, 2007 2:24:55 PM
   Lease Expires . . . . . . . . . . : Thursday, July 19, 2007 3:40:12 PM
   Default Gateway . . . . . . . . . : 192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DNS Servers . . . . . . . . . . . : 192.168.1.1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 6:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : isatap.{931E13B8-1713-4AAF-82DD-59114D172902}
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   Default Gateway . . . . . . . . . :
   NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 10:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : isatap.{2A40537E-6213-4503-8F9A-F07625D83759}
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::5efe:192.168.1.3%14(Preferred)
   Default Gateway . . . . . . . . . :
   DNS Servers . . . . . . . . . . . : 192.168.1.1
   NetBIOS over Tcpip. . . . . . . . : Disabled

Also, try toggling the Fn + F2 keys to turn on/off the wireless?

 

http://support.dell.com/support/edocs/systems/ins6400/en/om/MD402AO3.pdf

 

Check the physical connection of the 2 antenna cables for your wireless card?

 

http://support.dell.com/support/edocs/systems/ins6400/en/sm/cards.htm#wp1015787

 

 

Try these?

 

1) Check to make sure the Internet Protocol (TCP/IP) properties for your I6400's network connection are set to obtain the IP and DNS server addresses, automatically?

 

2) Make sure the router's web utilty is configured to allow the I6400 access to the internet?(including any security encryptions)