Cannot Connect to Wireless Network After Changing Security Settings

[markaz]

I have a situation where I have to disable my home wireless network when connecting to my office's network...cable connection only. Used to be that I could enable my wireless network and both my PC and laptop would connect automatically. After changing the security protocol from WEP to WPA2-PSK on my router (TrendNet TEW-632BRP) my laptop will not connect to the network automatically. I have to turn the power off of the router for 10 seconds and then power up in order to connect. Funny, but I just bought one of those cheapie 300Mbps Mini Wireless USB Wi-Fi Adapters for my home built PC and it connects instantaneously after I've enabled the wireless network. Any ideas on why the laptop won't connect automatically?

 

[samuria]

How old is the laptop and wireless card. A lot of old ones don't understand modern encryption and only work correct on wep

 

[markaz]

You probably hit the nail on the head. It's an Asus UL30A. Bought it in 2010.