Can't connect to Wireless Signal.

[Cajete]

I have a D-Link that 2 other laptops are on. It's unsecure, signal strength is 100%, and the WiFi on my Toshiba laptop is on... Yet when I attempt to connect it won't let me. Say's i have to diagnose the problem and bah bah bah. What could be wrong?

 

[Ethereal_Dragon]

What SPECIFICALLY is the error message telling you? Have you installed the proper drivers for the wireless on the Toshiba? Is this built-in, or an add on card? Do you have enough addresses in the DHCP pool on the router? Does the router have MAC address filtering enabled?