My i9950 has been steady for years now. BUT suddenly... today it refused to print and gave me the following "alarm/warning": (Translated from Norwegian): "A cassette that is not supported (not accepted by the printer) is installed. Swap/change to a photo BJ-cassette".\r\n\r\n-\-\-\-\-\-\-\-\- \r\n\r\nI have NOT changed anything (except original Canon ink cartridges). So I wonder why this came up now. And is there an easy solution?