I'm not sure about Memao part, but in order to make Idle Walk Run state in Animation Solution, it only requires 1 step:
Add _Idle, _Walk, _Run to your file.
Example: $filename_Walk_fx.png - x is your total amount of frame. Same goes for Idle and Run. Make sure you watch the video tutorial the front page.
This plugin also allows you to change all those keyword into something else, so make sure you check what the keyword for Idle Walk Run are, in case you accidentally changed it in the parameter. Animation Solution gives the user this freedom.
If you want further help, please record a video and send to my Discord and tag me.