WD Not Downloading Overnight Data

Have a Davis VP and am running WD 9.52e. Turned PC off 2/4 at 21:24. Turned PC back on 2/5 at 12:25. WD only downloaded data from 12:25 - 12:29. Told WD to exract data from data logger starting at 2/4 21:25. When finished, checked 22003lg.txt to make sure data was in - no data, but graphs looked OK. Told WD to convert graph files to log files - data appeared, but I had to edit duplicate entries out. When told to extract data from the data logger, WD seems to be bypassing the logfile and entering the data directly into the graph files. Had same problem on 2/1.