Today I tried to open a Calc file but it is empty with 0 kb.

Today I tried to open a Calc File but it is empty with 0 kb. When I click on the file it will open in Writer and this text shows up:

PK########ï¨>N…l9Š.###.#######mimetypeapplication/vnd.oasis.opendocument.spreadsheetPK########ï¨>N################Configurations2/progressbar/PK########ï¨>N################Configurations2/menubar/PK########ï¨>N################Configurations2/images/Bitmaps/PK########ï¨>N################Configurations2/floater/PK########ï¨>N############’###Configurations2/accelerator/current.xml##PK##############PK########ï¨>N################Configurations2/toolpanel/PK########ï¨>N################Configurations2/statusbar/PK########ï¨>N################Configurations2/toolbar/PK########ï¨>N################Configurations2/popupmenu/PK########ï¨>N############

How can I recover my original Calc file?