WiFi tethering set up on Vista Laptop

I recently signed up for a tethering plan on my iPhone 4. The option is now enabled on the phone, with the password to use showing. I am trying to configure my laptop, running Windows Vista, to use the hotspot generated by the iPhone. The SSID of my phone shows up on my laptop, but I can't seem to figure out how to configure my laptop to log on to my personal hotspot. What security setting do I need to use? The closest I can get is using "WPA2-PSK" access point authentication, and "AES" encryption. When using these settings, and entering in the proper password, the iPhone will show 1 user connected, but my laptop never actually gets a connection. I have rebooted both the iPhone and the laptop. Any help? Thanks!