expand disk procedure failed, all lost

Hi,
my parallels 9 is installed on a mac osx mavericks
no bootcamp partition, only virtual machine with installed windows xp sp3

over the years my parallels partition eaten more and more space so to dte was occupying 64 gb, but once i've checked the actual windows hd size it was of 36 gb
so i turn off windows and i tried to use the resize disk under configuration, i moved the slide from 64 gb to 40 gb and clicked apply
(i didn't backup anything)

during the procedure it failed,
now when i start parallels i get this error "Trying to boot from Primary Master IDE drive ..."
and nothing happens

is there anyway i can fix this and get access back to all my files?

thank you