Prince of Persia the forgotten sands The Palace door with 3 Summoners doesnot open

download these 3 files and place in the save game folder

https://drive.google.com/folderview?id=0B2IpMNuJgoeERnlzOVpIU1VsUEE&usp=sharing

here you will find the save game folder

C:\Users\place your pc username\AppData\Local\storage\SKIDROW\11