Grappling Hook Help

so i am currently running this grappling hook --> http://steamcommunity.com/sharedfiles/filedetails/?id=182889739, but for some reason its like the gravity is weird. The grappling hook works a little but doesnt really lift you off of the ground. I have no idea what is happening because it didn’t used to do this when i had the same one on about a month ago. does anyone have any ideas as to why this is happening, any help would be greatly appreciated.

ask to the developer