I am trying to start to speedrun GTA and have just got LiveSplit. I have it on the left side of my screen. But if I aim too far left and shoot it clicks onto LiveSplit disrupting the run. I have tried using Lightnat0r's cursor jail but it doesn't work for me.

I hope this is the right place. I am trying to start running GTA V and have recently got LiveSplit. However, I have it on the left of my screen and if I aim to far left and shoot it clicks on LiveSplit disrupting the run.