How to fix XY Coordinates

I am automating Powerpoint application.
As per scenario I want to drag a object from XY coordinate to another XY coordinates.
Some time test item passed and expected actions take place but some times it get passed but expected action dosent take place that is object dosent get dragged

Also same test items when got passed in my local machine and the expected actions took place at the same time in Virtual machine expected action dosent take place