I've now connected with 128 bit WEP which I'll document here. You can see the images by clicking on the appropriate links. I would suggest bringing up the images in separate tabs or windows.
Again, for completeness I'll start with configuring the router. I realize the one you're using is already configured and the configuration screens may look different anyway.
This image shows the successive steps with the router. The first panel shows I've entered the passphrase:
maryLittleLAMB. Clicking
generate yeilds the middle panel and clicking
apply yields the final panel.
This image shows the filled-in dialog brought up by
nm-applet when I asked to connect. Clicking
Login to Network, after a little delay, brings up the
Connection Estalished tooltip.
While I am connecting, the
nm-applet icon changes to some kind of clockwise circular motion with two dots that eventually, in sequence, turn green. I discovered that if a gave the wrong passphrase (forgot which characters I had capitalized!
) the first light would (surprisingly!) still turn green but eventually the connection would fail with the reappearance of the dialog asking for the passphrase. Unlike your experience, there was nothing already filled in. But I am (probably) using a different version of
nm-applet than you are. From previous mishaps, I know that the first light turning green but then the reappearance of the dialog can also be cause by no DHCP server being available on the subnet. (Usually DHCP is handled by the router, but it can be configured otherwise.)
(In case anyone -- with malicious intent or not -- is wondering, the above WEP configuration and passphrase are history and my router is now back to a WPA2 configuration.
)