Export Maya Animations to Unity But It Shows Nothing

Hi everyone,

The title describes the question, I tried to export Maya animation as FBX file and after it was imported into Unity3D, I throw it into the Hierarchy but all I see is an "invisible object" that can be moved/scaled but just shows nothing, no animation, no even models.

I did try to clear the history in Maya, scaled the imported FBX to 1, reinstalled both Maya and Unity3D, but the issue's still there, driving me mad.

I am using the latest version of Unity(3.4.1f5) and Maya 2011, sincerely thanks for your viewing, looking forward to your thoughts.

Update: I think I knew the reason lol, sorry for my stupidity. I'm doing the 2D animation, and I was actually seeing the part that's not existed in 3D view lol. If you're doing the 2D animation and face the same issue with mine, you can try to rotate the object 360 degrees, then you might see it actually exists.