Error updating and deleting with Oracle (HELP!)

Question

I have a simple table in Oracle 8.1.7 with this structure:
CREATE TABLE TC_PROVS_SMS_SA
  CODIGO_OPERADOR     NUMBER(5)                 NOT NULL,
  NOMBRE              VARCHAR2(40)              NOT NULL,
  CON_RELACION_DESDE  DATE,
  NOMBRE_CONTACTO     VARCHAR2(40),
  TELEFONO_CONTACTO   VARCHAR2(10),
  PCT_LIQ_CREDITO     NUMBER(8,5)               DEFAULT 0                     NOT NULL,
  COMENTARIOS         VARCHAR2(4000),
  INSERTADO_POR       VARCHAR2(20),
  INSERTADO_EL        DATE,
  MODIFICADO_POR      VARCHAR2(20),
  MODIFICADO_EL       DATE,
  VERSION             NUMBER(5)
)CODIGO_OPERADOR is the PK.
Im editing the data in a form with Text FIelds.
When I call rowset .updateRow() (in save button action method) I got:
javax.faces.FacesException: #{editarProv.btnGuardar_action}: javax.faces.el.EvaluationException: javax.faces.FacesException: java.sql.SQLException: [Sun][Oracle JDBC Driver]Unable to determine the type of the specified object.
I already try changing the query limitig columns, I fill all the columns in the database, etc. but no lock.
Also, trying to delete the row gives me:
javax.faces.FacesException: #{editarProv.btnBorrar_action}: javax.faces.el.EvaluationException: javax.faces.FacesException: java.sql.SQLException: [Sun][Oracle JDBC Driver]Invalid parameter binding(s).
As you can see, its the Sun�s JDBC.
PLEASE HELP !!

Answer 1

Thak you jawbe.
I avoid the DATE field and scale the NUMBER to NUMBER(p, s) then can insert and update. Im not quite shure if this was the solution or avoiding DATE field (see below).
There is another problem with DATE field. Since it mapped to TIMESTAMP the component or the JDBC driver spects time information. I can insert and update if I enter date and time but my user shouldnt must enter time info when the field is intented to be just date. Im working now in assigning by hand (from and to rowset) and spect to get working soon.
The problem with the deleteRow() stills. I will see further and let you known.
Regards.