Ligatures can't be displayed

Hi, guys!
I created a handwritten font recently, for making the font more beautiful, I decided to create some ligatures. However, the ligatures cannot be displayed on Photoshop. For instance: fi
3.png
It was displayed on Photoshop like this:
2.jpg
I wonder what the problem is and the solution. It would be very helpful and nice that you could write a reply clearly, for I’m not so skilful with FontCreator.

Thanks and Best Wishes,
Quintus. :slight_smile:

Have you added a ligature substitution to your font? Which version of FontCreator are you using?

Oh! Excuse me, I add the ligatures substitution to Kerning mistakenly. Now it can be displayed.
Thank you sooooo much! :smiley: