program crash when clicking view to read database

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Mobile

Android

SQLite

hi,

the program i am creating has two buttons, one to add records and one to view all added records.
the records add succesfully, but records cannot be viewed. i dont understand what ive done wrong:

public String getData() {
    // TODO Auto-generated method stub
    String[] columns = new String[]{KEY_ROWID, KEY_TYPE, KEY_MODULENAME, KEY_ASSWEIGHTING, KEY_ISSUEDATE,
                                      KEY_DUEDATE, KEY_NOTES};
    //Read information from columns
    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
    String result = "";

    int iRow = c.getColumnIndex(KEY_ROWID);
    int iType = c.getColumnIndex(KEY_TYPE);
    int iName = c.getColumnIndex(KEY_MODULENAME);
    int iWeighting = c.getColumnIndex(KEY_ASSWEIGHTING);
    int iIssue = c.getColumnIndex(KEY_ISSUEDATE);
    int iDue= c.getColumnIndex(KEY_DUEDATE);
    int iNotes = c.getColumnIndex(KEY_NOTES);

    //read entries until cursor is at the end of the last entry

    for (c.moveToFirst();!c.isAfterLast(); c.moveToNext()) {
        //set result to information being read
        result = result +c.getString(iRow) + " " + c.getString(iType) + " " +
                c.getString(iName) + " " + c.getString(iWeighting) + " " + c.getString(iIssue) + " "
                + c.getString(iDue) + " " + c.getString(iNotes) + "\n";
    }
    return result;

}