today i got on MIRC and it is executed but it doesn't show up. when i click the taskbar item of MIRC it looks like it is minimizing and maximizing but you only see an outline briefly then it disappears. what's going on and how can i fix it?

Are you perhaps using any addons or scripts? If you are, they may be modifying mIRC's windows incorrectly, which could cause this type of behavior. If you know where mIRC's "scripts" folder are located, you could rename them and then run mIRC. The only other option would be to download mIRC again from the mIRC website and re-install to see if that solves the problem.