Hi, nice to have you here again. Hope all is well.
I am not at all familiar with this game so unfortunately all I can do is to refer you to a walkthrough. Sometimes looking at a different walkthrough can be helpful. Try taking a look at
this one or
this one. Sometimes a walkthrough can be worded differently enough where one is more helpful than another.
Otherwise, let's wait for someone who is familiar with this game.
As a last resort you could also check out a video YouTube walkthrough to figure out where the problem lies; I checked YouTube and there appears to be at least one.