[jopendocument] Problem to reopen saved spreadsheet documents

[googleuser]

Hello,

i use the jOpenDocument library to save and open OpenOffice
spreadsheets. I have the problem
that saved data created with the library cannot be reopened with the
library.
However, i can open the saved data with the regular OpenOffice
application.
Here is the code how i save the data.

TableModel model = new DefaultTableModel(data, head);
                                try {
                                        sheet=SpreadSheet.createEmpty(model);

                                } catch (IOException e2) {
                                        // TODO Auto-generated catch block
                                        e2.printStackTrace();
                                }

Do i miss something ?

Thanks in advance for any help