Cannot open book from within calibre

Hi,

whenever I try to open a book from within Calibe, the following error notification pops up: calibre, version 0.8.38
ERROR: Exception non gérée: <b>WindowsError</b>:[Error 5] Acc�s refus: u'C:\\Users\\wam\\Documents\\Calibre\\Jan E. Stets\\Handbook of the Sociology of Emotions (492)\\Handbook of the Sociology of Emotions - Jan E. Stets.pdf'

Traceback (most recent call last):
File "site-packages\calibre\gui2\actions\view.py", line 201, in view_triggered
File "site-packages\calibre\gui2\actions\view.py", line 269, in _view_books
File "site-packages\calibre\gui2\actions\view.py", line 236, in _view_calibre_books
File "site-packages\calibre\gui2\actions\view.py", line 101, in view_format_by_id
File "site-packages\calibre\gui2\actions\view.py", line 132, in _view_file
File "site-packages\calibre\gui2\actions\view.py", line 122, in _launch_viewer
File "site-packages\calibre\gui2\__init__.py", line 779, in open_local_file
WindowsError: [Error 5] Accès refus: u'C:\\Users\\wam\\Documents\\Calibre\\Jan E. Stets\\Handbook of the Sociology of Emotions (492)\\Handbook of the Sociology of Emotions - Jan E. Stets.pdf'

Any idea?

Thanks