Splash screen not appearing on startup

Hello, I just installed Comodo Firewall v6.2.285401.2860 yesterday on an HP Compaq nc6400 notebook pc and it appears to be working fine except for one issue. The splash screen is not showing up on start-up. It was working fine yesterday but today the splash screen has not appeared at all. I have the box for “show splash screen on start-up” checked in the User Interface tab, so it should appear on start-up. Can someone help me to get the splash screen to appear?

Thanks

Sorry forgot to add that my OS is Windows XP.

Thanks!!