Hi Ray,
Did you open the Adjustment Method Options dialog and click ‘Detect Baseline ETo’?
I’ve getting a error (Unable to detect baseline ETo: ETo data is not available for this location.(404)) when doing that here (Adelaide, South Australia).
Not sure where else to find baseline data from – I can access current data from http://www.bom.gov.au/watl/eto/tables/sa/adelaide_airport/adelaide_airport.shtml