I can help you.
1) Do not insert the card.
2) Install the software that came on the CD.
3) Download the beta driver here:
ftp://ftp.linksys.com/beta/SW_CD_Beta081903PPC2003.zip
4) Make sure Axim X5 is in cradle and attached to ActiveSync
5) Unzip and install
6) It looks like nothing happens, but it did.
7) Insert WCF12
8) Card is OK, Application works, but site survey does not.
9) Use PocketPC Network Card to configure.