Please help me , I have been using FX plug-in effect about 2 weeks . Everything was working fine until last night when I changed the plug-in effect . I tried to switch back and forth between video effect features such from corlor corection effect to saturation effect etc....to get the most effective one I like for my wedding video. Certainly, I viewed back on my video preview window did not show any video effect. Eventhough I can move the slider of those FX effect.
Do you know what caused this problem ? I tried to close my AVI file without saving it , but when reopened it ,FX plug-in remain see no result effect in preview window. no matter which FX effect I chose.

Thank a lot for any advice