First off the Dell Axim X30 will need to have a wireless card in it in order for you to connect to the internet. Correct me if I'm wrong but I do not think that the X30s had the WiFi capabilities?
If they do, then you should see the "Towers" icon on your screen somewhere. Click on the towers, that look like cell phone reception bars, and then "scan wireless networks", choose your network, wait two minutes, and BOOM~! connected~!
If that doesn't work, open your system settings and go to connections, turn on your "Wireless Connection" and repeat the previous steps.
Should work.