AutoCad :: Not Registering Mouse Clicks

Problem: When doing a series of rapid mouse clicks, Autocad does not always register the clicks. For example, I'll use move, and when clicking on a line to move, it wont' see that I clicked on the line. I also notice that my crop box does not always work to select objects when i'm going fast. some times it does not show, others is goes to random points on the screen while still selecting the areas i've clicked in.

I've only noticed this problem when I'm in "the zone" and am clicking very fast, when I go slow, it picks up the clicks. its very frusterating knowing that I can't work as fast as I can without having the click input issue. I mostly notice this problem with commands like, erase, trim, move, and extend.

I do have my system set up for right mouse click as 'enter' via the autocad options, not sure if that has anything to do with it.

- It is not the computer system ( I recently got an upgrade at the office )

- Its not my mouse. I've tried several mice, and at home, in games and such, I don't get the fast click issue.

- I've changed the double click speed in the control panel when opeing folders, but no luck.

- its not an OS issue, happens in both XP and Win7, and shouln't be a computer hardware issue, considering I just jumped from a P4 to a new Haswell system.

- I don't know if it happens on other versions of autocad