mov files won't open on mavericks

hello

i have a problem to open a mov video file that created in iMovie through mountain lion.

since i upgrade to mavericks that mov file won't open.

i try all the ways by using most of the convertor application that i can use.

even try with quick time 7 adding codecs packages and perian but nothing show on ....

i can't get even infos from that file. It only shows that is 8,9 GB of space and nothing more.

please if you have an advise on this , i would be grateful

thank you

Dimitris .Greece