Fingerprint GT-521F32 ~ Trouble with Database Function

Wondering if anyone else has had trouble UPLOADING a database of fingerprints to the GT-521F32? I have multiple units at different locations that will all share the same set of taught fingerprints. Using the “Fingerprint Embedded System Demo AP”, the GET DATABASE function works fine. I save the file to a PC, then go to upload at another GT-521F32. The program only shows “Adding of 0th template…” in the RESULTS textbox for 10 seconds, then alarms with “Communication Error”. All other functions are still operable, however.

Thanks!