Are you moving flashcards over from PlecoDict 1.0 on Palm? Our iOS software can't read those cards, so you'll need to export them to an XML file using the Pleco Flashcard Converter utility - I've attached a copy of it to this message. Install the .prc file inside of this to your Palm, run it, and use it to export your flashcards to an XML file on your SD card; copy that file over to your iPhone and you should be able to import it in Pleco.