Can't connect to wireless connection

I just bought a new Dell laptop and I connected to our secure (password
protected) wireless network perfectly the first time. I then took the laptop
to school to do some work, and when I returned and tried to connect to the
same network it will not work. I can connect to other networks that are not
password-protected, but when I try to connect to ours it tries to connect but
then fails. Sometimes no networks will even show up for me to choose from.
Can anyone offer any suggestions? Thanks.

Hi
You should go over the security measures there is probably mismatch between
the secured Router and your laptop.
Wireless Security - http://www.ezlan.net/Wireless_Security.html
Jack (MVP-Networking).

"Shawn" <(E-Mail Removed)> wrote in message
news:83C81ED4-2714-424C-83EC-(E-Mail Removed)...
>I just bought a new Dell laptop and I connected to our secure (password
> protected) wireless network perfectly the first time. I then took the
> laptop
> to school to do some work, and when I returned and tried to connect to the
> same network it will not work. I can connect to other networks that are
> not
> password-protected, but when I try to connect to ours it tries to connect
> but
> then fails. Sometimes no networks will even show up for me to choose
> from.
> Can anyone offer any suggestions? Thanks.