find some of this http://upload.wikimedia.org/wikipedia/commons/f/fd/Flathead_Screw.svg flat head screw / small size just screwed your hook base with the wall. try at the gap or joint between tiles.
find some of this http://upload.wikimedia.org/wikipedia/commons/f/fd/Flathead_Screw.svg
flat head screw / small size just screwed your hook base with the wall. try at the gap or joint between tiles.