Try this.....I found this on another Dell Axim post and copied it.
Go and download the software, WLAN_ForWinCENET400.zip from
http://www.senao.com/default-1.htm "Run the installer and then do a soft reset. Then power back up and insert your Linksys card. The OS should give you and "Unrecognized card" pop-up. Enter 'wlannds.dll' (without quotes) into the input box and click 'Ok'.
Your link light should now be flashing green and you will be notified of the existing 802.11b networks within range (if any).
Going to 'Start->Settings->Connections->Connections' will also let you see networks w/in range."
I cant guarantee this will work....hope it does though!