I had a weird thing recently where on doing a hard reboot of my computer (windows 7 (64x)) all my mirc settings were wiped (though my remote.ini was fine, thankfully). I've think I've managed to get things back to the way they were, but I have one lingering problem:
When something is said in channel triggers the highlight flag, but I'm focused on a different window; the initial beep alert is sounded (which is fine) and the window flashes (also fine). The problem is that after this, the beeping continues approximately once every second until mIRC has focus again. This can be pretty annoying because I leave the computer on at night, and if I don't remember to leave mIRC in focus then it keeps beeping until i get up to fix it.
I've played around in the settings a bit (I'm by no means a terribly proficient user) but I can't seem to solve it. Does anyone know where I'm going wrong?
I don't have any scripts that alter highlights, and this is what my (main) highlight looks like

I'm willing to do screengrabs of anything in settings that you find suspect.
Cheers