log4net DbType String > MySQL "TEXT" > "Data too long" MySqlException?

[THY02K]

hello

In log4net mappng file DbType String (4000)

                     <parameter>
               <parameterName value="@message" />
               <dbType value="String" />
               <size value="4000" />
               <layout type="log4net.Layout.PatternLayout">
                    <conversionPattern value="%message" />
               </layout>
          </parameter>

In MySQL, database column is declared "TEXT"

DROP TABLE IF EXISTS log;

CREATE TABLE log (
      Id bigint NOT NULL AUTO_INCREMENT PRIMARY KEY,
      CreateDate datetime NOT NULL,
      Thread varchar (255) NOT NULL,
      LogLevel varchar (50) NOT NULL,
      Logger varchar (255) NOT NULL,
      Message TEXT NOT NULL,
      InnerException TEXT NULL
          );

And I keep getting "Data too long for column 'Message' ..." MySqlException for some reason... I googled a bit, I think I am right using log4net DbType=String.

Thank