[otrs] adding fields to MySQL tabel

Hi, I did add some fields (like department) to 'customerMessagenew.dtl'. I add the same fields in the table 'ticket' (with ALTER table ...), but when I make a new ticket and fill-in data into the new fields in the webinterface , the data is not displayed in the database... Do I have to add the fields somewhere else too and/or do I have to make other changes? Do I have have to make changes to the program 'customerticketzoom.dtl' ? Greetings, Rene