Question [Q] Knox

Hi, I have installed Knox in my Samsung galaxy note 3 and galaxy S4 but in note3 am able to move images and other documents to knox mode but in galaxy s4 can't able to move files to knox mode. In gallery when we go and select the image and go to menu options it shows the following options in note 3:
Favorite, Slideshow, Photo frame, Photo note, Signature, Copy to clipboard, Print, Rename, Buddy photo share, Rotate left, Rotate right, Crop, Set as, Details, Settings, Move to KNOX.

But in Galaxy S4 shows:
Favorite, Slideshow, Photo frame, Photo note, Copy to clipboard, Print, Rename, Buddy photo share, Rotate left, Rotate right, Crop, Detect text, Set as, Details, Settings.

In galaxy S4 Move to KNOX options are not showing if any one can help me to fix this...

Regards
Dharmaraj R.