Help restore some network settings

I screwed up my network (wireless) I will save you the the long story of how/why, but I ended up having to reset the router. I've gone back in and restored all the settings, but I can't seem to get the Padlock next to my network name (before I had it) I'm using a WEP password with MAC filters on the router. What setting am I missing? Its a linksys Router.
I've gone into the network:airport setting and the network name is there with WEP password as security. I've went to show networks in this preference window, and it shows me my network with the padlock, as well as the other networks.
Can anyone help me with securing my network (dose that give/show that I have additional security?)
Thanks

Hello, 
Try removing MAC address filtering (at least whilst you get a connection) and change the encryption on the Linksys to WPA (unless you are running OS 9 on this iMac in which case you'll have to stick with WEP). WEP can be cracked in a couple of minutes and the length and type of key can cause connection problems.
mrtotes

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