Trigger problem

[rembrechts]

I want to change two fields in a table when a record is created. I've written a trigger that should do the trick, but it won't. Can somebody help me?

create trigger Insert_TS_TBL_Unfinished before INSERT on TBL_Unfinished
  FOR EACH ROW
    BEGIN
     set new.Recordcreated_servertime = now();
     SET new.Recordmodified_Servertime = now();
    END