its hard to explain it to you D-Squall,because my english is totally bad!!hihi,but I can explain a little...
1.where the place aircraft was landed,I'm going to the east area first but if I remember there is no switch.So I move to previous area and go west area
2.In 4 split road,I'm going to the south,west and when I'm going to the north,I fight Guidibba!(I have past the Iron Manor I think)
3.After that,I'm going to the next screen to the north and turn on all the switch that I can find.
4.I'm back to the previous screen and take the elevator to 2nd.I'm go to the next screen to the north and in the next screen there is horizontal long road.
5.I turn on the switch at the far left and go to the north room and turn on all the switch in the all screen.Then,I go to the east and fight Guidibba again and hit him by aircraft and I go to the next screen.I'm doing the same,just through all screen and turn on all the switch.
Now my problem is...,when I go to the previous screen(the horizontal road)there is a gate or a door that closed at the southeast!and when I go to the west area(Left Factory).there is two door that closed(at the next screen in southeast and southwest,and there is a pink or red lady and one chest in the southeast.
So what should I do???

if you're looking forward do not you look into backward.because all members of your body will look back as well.