[SpeedBum9]

running calibre with my kindle has been graet, however in the last week when i try and send the papers i like ot the kindle i get the following error message

[Errno 30] Read-only file system: '/media/Kindle/documents/News/The Irish Times (Friday, December 31, 2010) - calibre.mobi'

Traceback (most recent call last):
File "/usr/lib/calibre/calibre/gui2/device.py", line 56, in run
self.result = self.func(*self.args, **self.kwargs)
File "/usr/lib/calibre/calibre/gui2/device.py", line 233, in _upload_books
metadata=metadata, end_session=False)
File "/usr/lib/calibre/calibre/devices/usbms/driver.py", line 109, in upload_books
self.put_file(infile, filepath, replace_file=True)
File "/usr/lib/calibre/calibre/devices/usbms/cli.py", line 53, in put_file
with open(path, 'wb') as dest:
IOError: [Errno 30] Read-only file system: '/media/Kindle/documents/News/The Irish Times (Friday, December 31, 2010) - calibre.mobi'

can anyone help

p.s. just started using ubuntu a couple of months ago so don't really have a clue what i'm doing)