13 Ghosts

I cant seem to find all 13 ghosts can someone please help me so I can move forward

Go to desktop computer.
Type in the password - purgamentum or I purgamentum Exit .
Press your computer's enter button.
Click 'I am' button and start the timed ghost hunt.
Find the 13 ghosts and click on them within the allotted time.
Exit the library to the Great Hall and turn right click on ghost (1) on wall.
Main Hallway - Turn around, go through door and go to the hallway.
Turn left and go close to the cricket trophy.
Turn around and click on ghost on the left (2) wall.
Go forward to the kitchen door, turn around and click on ghost left of kitchen door (3).
Turn around and go to the other end (picture) of the hallway. Turn around and click on ghost at right (4) wall.
Exit through the nearest door on the left to go to the Great Hall.
Great Hall - Turn around and click on ghost left of door (5). Turn around and click on ghost on floor by middle column (6). Turn left and enter conservatory.
Conservatory - Go down the stairs and click on ghost on the urn stand (7). Go back up and click on ghost right of the door . Exit conservatory.
Go to the stairs and click on ghost on left newel of the stairs (9). Climb up the stairs.
Second floor hallway - Turn right and go to the East Hall by the locked door with crest and click on ghost (10) at right wall. Turn around and go back to the hall by Mrs. Drakes room. Click on ghost on left wall (11) across from Mrs. Drake's room. Go forward to Nancy's room and turn around and click on ghost by Nancy's right of room door (12). Climb up the stairs that sing and click on ghost above the levers (13).
That's it - 13 ghosts. Go back to Arthur's computer in the library and enter the password.

Or you can search the walkthrough on yahoo, google or anything..

My biggest problem on the ghosts is in clicking on them in time. I have tried twice so far and will keep going untill I get them all.