Hi , I'm the owner of new dell axim x51v and it works with out any problems, I did have a problem in the beginnig , I called tech support of SYSON company , I had a chance to talk to guy his name is Keith Geiser . We tryed to go over the steps how to make that gps CF card work on dell .
ok so here is the solutions for that :
her is the link which you should read :::
http://www.looket.com/eng/cs/cfmem_gps.php
Dell Axim needs to open port COM 4
then you have to download software called winfast navigator 1.0
this software let you switch between SIRF and NEMW mode for GPS
The original software which comes with GPS doesn't work to switch those modes , just follow the link which I gave and you should be fine .
thanks to Keith Geieser :-)