Mod_python error: "PythonHandler cldispatcher"

Traceback (most recent call last):

  File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/home/httpd/cuocoadomicilio.info/cldispatcher.py", line 85, in handler
    return handlerfunc(req)

  File "/home/httpd/cuocoadomicilio.info/clresources/guestbook.py", line 112, in handler
    req.write(str(HTMLResource(req)))

  File "/home/httpd/cuocoadomicilio.info/clresources/guestbook.py", line 103, in __str__
    sgutility2.htmlutilities.gen_captcha(text, os.path.join(root_dir, 'Arial.ttf'), 50, fname)

  File "/usr/lib/python2.4/site-packages/sgutility2/htmlutilities.py", line 200, in gen_captcha
    im.save(file_name, format=fmt)

  File "/usr/lib/python2.4/site-packages/PIL/Image.py", line 1299, in save
    fp = __builtin__.open(fp, "wb")

IOError: [Errno 13] Permission denied: '/home/httpd/cuocoadomicilio.info/cmsimages/6485e7209f1c6b0188f3229e5e84e1bb1e8e276b.jpg'