MouseMove in game causes my player to spin rapidly

[memes2stronk]

I am trying to use MouseMove in a FPS game (windowed.)

Whenever I try to use MouseMove, the player spins rapidly at the ground or at the sky.

This has happened in 2 games I have tried, here is the part of my code that moves the mouse:

		If $enabled = 1 Then
			If _IsPressed("01", $dll) = 1 Then

				Do
					$result = _ImageSearch($picture,1,$x1,$y1,0,0)
				Until $result = 1

				If $result = 1 Then
					MouseMove($x1,$y1,50)
				EndIf


			EndIf
		EndIf

I have tried changing the speed of the MouseMove higher and lower, and it does the same thing. (I've tried 5, 50, 500, and 5000 speed).
This color / image is not in the game anywhere else, only where I am trying to aim.
EDIT: After making this post I tried using

_WinAPI_Mouse_Event($MOUSEEVENTF_MOVE, $x1, $y1)

And it's better, instead of spinning it moves my aim to the ground but not completely down.

Any help would be greatly appreciated.