problam with Animation

hello, sorry i can’t write EN very well
my question: i create a box with simple animate in 3dmax and export fbx, then import in unity, animate play with no problam,
when i create 2 or more object and create animate for one object , when export fbx and import in unity animation not import and no play, please help me,
my file with animat : http://www.mediafire.com/?aqubqwkrbudbmyi
please download and help me

link both of your animated objects to a 3rd object, which would be a root

or export them separately