Animations not playing correctly, help?

I have been working on my game Mythicality, and i have a problem when i use custom animations for the fall animation it doesn't load correctly it works at first but then uses the default Roblox fall animation.

-if ur wondering y i need the fall animation its because i have a fly script where when u fly it plays a certain animation but if u idle while flying it uses the fall animation.

You have to press play in the studio then go into workspace then you will see a model with your username, click the dropdown arrow you should see a script in your player that is titled animate. Once you see it copy it then click stop to stop playing. Then paste the animate script into StarterCharacterScripts. Once you have don't that click the dropdown arrow on the script and you will see a bunch of values, you will want to click on the one called fall. Then click the dropdown arrow on the value and you will see a little thing called FallAnim, look for the thing in its properties titled AnamationId. Once you have found that paste the link or the id of your animation there.