I tried this as well, was able to export 2.0 CC characters into iClone 6.5.
I have the Assassin Playset, I cannot export into iClone6
1) saving as 2.0 and iclone i get "failure to load" error
2) saving as cc1.5/6.5 I get "exporting error"
All of my iclone is up to date. iClone 6, 3Dxchange, and CC 2.0.
Any suggestions?