cpil.exe Testing fails!!!

After installation of comodo firewall, my system is in worst condition. CPU usage always 100% and I cannot run programs (:SAD). I tried firewall testing link from the website but it fails, I think. Because when run cpil.exe it shows a command window and I entered text in it and the command window shows Success!. But comodo firewall did’nt alert me about the program running and an IE window opens with about:blank. It is better to uninstall the same otherwise my machine will be useless for me (:SAD)