Rafa,
Are you able to do the following steps? If not, let me know what problems you encounter and when. This information is taken from the LabVIEW PDA User Manual (Version 7.1).
On the development PC, select a Pocket PC 2003 device from the Execution Target pull-down menu (Operate>>Switch Execution Target) to build VIs for a Pocket PC 2003 device. The Execution Target pull-down menu lists each Pocket PC 2003 device that is connected to the host computer and a generic Pocket PC 2003 (Default Device) option.
After you develop the VI on the host computer, you build the PDA VI into a PDA application by clicking the Run button if you configure the Run button to build the PDA VI into a PDA application. You also can select Tools»Build for PDA. The Build PDA Application dialog box appears.
Note: The Tools»Build for PDA menu item is disabled when you select LabVIEW for Windows or any other non-PDA target as the execution target.
The PDA Module builds the block diagram code into an executable PDA VI you can run on the PDA target. On Pocket PC 2003, PDA VIs are .exe files. You then download the PDA application to the PDA device by selecting Operate»Download Application or by clicking the Run button. You also can use the software the PDA device provides to download a PDA application to a PDA device as you do any other PDA application.
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Michael P
National Instruments