[Kimossab]

Quote:

This function can be used to make objects rotate smoothly. In order to achieve this however, the object must also be moved.

source: https://sampwiki.blast.hk/wiki/MoveObject

You need to move even if it's just 0.001 in x or y or z to make it visible rotating. When you just change the rotation you can't see the object rotating unless it moves a bit.
So in the part of move object add 0.001 in x, y or z.