Calculation forms not updating themselves

Hi,

Thanks for this great plugin.

I just bought the pro version, basically because of the widget function. However, I have a problem with the forms not updating themselves when I type in a date in the pregnancy calculator.

The forms update when pressing enter after choosing a date, but I would like this to happen automatically.

Can you have a look? http://www.oslocitylegesenter.no/calculate-test/

http://ww.wp.xz.cn/plugins/calculated-fields-form/