I am no sure what could have happened, but maybe you can retrieve them
with Shadow Explorer ( 'ShadowExplorer.com - About'
(http://www.shadowexplorer.com/)) If you need operational details, watch
this video tutorial ( 'Tutorial: Recover lost files with Shadow Explorer
« How-To Geek Forums'
(http://www.howtogeek.com/forum/topic...orer?replies=6)
). In addition I hope you still have the photos on the card in your
camera. I never delete them from the SD card. With the low price of
those cards these days, it is not worth deleting them.


--
whs