Can't save wi-fi network

[Barnsworth]

Somehow my home network was removed from my phone. Regardless when I go into my wi-fi and turn it on it finds my home router. I long press on the network name and hit "connect to network". My router/network pops up wanting the WEP code which I enter but my "connect" button stays greyed out. Anyone know what gives?

I know the router is working I have two other pc's running off of it wirelessly.

This is on a Moto Droid X

Thanks for any suggestions!