Needs more information and a well-understood question.

What software are you using? How many machines are you using it on? Windows/Mac/Linux? (etc)
What are the detailed steps to reproduce your problem? I.e. describe "when i start" and the steps you use to start the program, and "split there ways" -- are they casting at multiple targets? Are they not responding to keypresses?

With the correct information we may be able to give you the correct solution.