Can't see objects in FLA file on Animate

Hi,

I'm new to animate and a while ago I attempted an animated sort of banner and saved it as a FLA file and output as a swf file too.

I recently went to make edits and when I open the FLA file in animate - Scene 1 is just a white space and when I click on Edit Symbols there is a list of the different elements which also show as a white screen - but also show a white circle, a cross and a green motion line. All the objects are either text or drawn objects but non are showing. I've tried changing the background but they are still not showing. It looks like all the movements are there but just not showing the objects.

Any help would be appreciated.

Thank you