MySql Questions

I am using MySql version 
5.0.51b-community.
I created a table like this :
CREATE TABLE `cbse`.`employee` (
`ecode` INT NOT NULL ,
`ecode1` INT NOT NULL,
`ename` VARCHAR( 20 ) NOT NULL ,
`sex` VARCHAR( 1 ) NOT NULL ,
`grade` VARCHAR( 2 ) NOT NULL ,
`gross` DECIMAL NOT NULL,
CHECK (`ecode`<`ecode1`)
) 
and the strict mode is on :
SET @@global.sql_mode= 'STRICT_TRANS_TABLES';

still I am able to insert a row with ecode = 20 and ecode1 = 10 .
How?

Ans : 

>>Is there any alternative for the CHECK clause then?
Alternative... use triggers for this.... before insert you can check whether values are proper..

>>And does this clause work for Oracle db? Since
I saw it in a book which is supposedly written
keeping Oracle in mind.

It works for Oracle... Oracle enforces this constraints strictly.