Hi,
By default, the LabVIEW PDA Module does not build PDA applications that you can debug on the PDA device. To enable debugging, select Tools>>options>>Run button action for PDA targets>> (select the radio button for "launch and debug application". Click OK. Also select Tools»Build for PDA and click the Code Generation Settings tab. Place a checkmark in the Generate debug info checkbox and build the PDA VI into a PDA application. After the above steps, you should be able to debug your applications using Step into node. Please keep in mind that execution highlighting is not an available feature for LabVIEW PDA module. More information about debugging is available in the LabVIEW PDA Module User Manual (http://digital.ni.com/manuals.nsf/websearch/1F7C42872BF13E9F86256E510067E175?OpenDocument&node=132090_US).
Hope this helps,
Ankita A.