Problems exporting AAf from Final Cut pro X

HI,

Im trying to export an AAF file from FCPX using X2Pro app. I keep getting error messages and cant work out whats wrong!

Error as follows:

Writing AAF file

Adding assets to AAF file

Adding essence for asset [IMG_1655] to AAF file

Adding essence data to AAF file for portion 0 of asset [IMG_1655]

Adding audio data to AAF file

Adding Sample Data

Creating Essence Data Objects

Error code: 0x80000004

No AAF file has been generated.

Can anyone offer some help?

Thank you!