Time Slider not appear after check enable time on this layer

Hi all,

As my topic name, I'm confusing about that problem my layer already had Time field but when I check enable time, my Arcmap shows nothing :( I attached some pictures to clearify my problem.

This is my layer table before enable time
Attachment 30247

After enable and apply :( nothing appears
Attachment 30248

My layer table after enable time
Attachment 30249

:( please help me to solve this problem :(

Best Regards,

Phuong Nguyen

Attached Thumbnails