Tomb Raider Wii Nintendo Wii Tomb Raider Help Croft Mansion?

Nintendo Wii Tomb Raider help Croft mansion? - tomb raider wii

I locked myself in the library / study, parents. I know I can jump from the balcony and get the image of man and there is a round thing behind him. How do I get the door unlocked? It is a flashing red light next to him and when I try the door that says: "I might never closed the doors.
Any help is welcome. So, how can I get the fire in the lobby, into the back room?