Mine crapped out on me about 6 months ago so I'm working off memory here. The router has to be set for WEP encryption and I think I had mine going with 128 bit.
You probably already know this and I don't want to come off sounding arrogant but if I recall, you have to enter all of the WEP code into the iPronto and not the passphrase.
There are sites like this one
[Link: netpoint.com] that allow you to type your passphrase and generate the key for your iPronto.
You said you couldn't ping 192.168.1.1. That's your router so you should have definitely received a response if your computer was attached to that network. Maybe it was a typo and you meant .1.24?
Good luck and sorry I couldn't be of more help.