Devil May Cry 3 for PS2 help?Please?

I am on Level 5 and just beaten the Devil,and it says to go to somewhere else.Then I went to the top of the tower and got a secret page to open.Then,I used the bouncer (which you get once the secret page is deactivated) to go to another door.The door,which I think is the page,is a room which is nothing to good use,so then I just went around the castle and found a door which is covered with crimson flame,which I can't get into to!I am stuck!Can someone please explain to me where to go or give me a link to a walkthrough?Thanks!