Ping Glitch

So, I just got parallels 8 (which gives me the option to switch between mac operating system and windows operating system) and when I try to ping now, the cursor goes off the screen to the point where I cant see it, which makes it nearly impossible to ping anything but the on my way ping. I love the pc client because now I don't lag during team fights, but this bug is very detrimental. Anyone have any solutions/ideas?