Having trouble securing my Time Capsule wireless network

Hi everyone,
I purchased the Time Capsule to use as my main source of wireless connection in my living room some few months back. Recently, I have noticed that my wireless network has been acting slower than usual, especially during peak hours. Popping open up system preferences showed me that my Apple wireless network was unsecured.
Several attempts of changing the WEP password and locking it proved unsuccessful, as I was able to detect the network on my mobile phone and on several laptops I have at home. Changing it to WPA and WPA2 also didn't fix this problem.
I just wanted to quickly ask if I am doing something wrong? Why am I still able to see my own wireless connection even if I am not using my own computer? (I tested the connectivity by using a seperate laptop I have and I STILL found the network as being unsecured on this laptop and both on my mobile).
Any help would be greatly appreciated!

Why am I still able to see my own wireless connection even if I am not using my own computer?
By default, all wireless routers will broadcast their Network Names (SSID). However, in order to connect to ones that are secured, you would either have to enter the encryption key manually or it can be done automatically if stored in your Mac's Keychain.

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    Message was edited by: Bob Timmons

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