Ok ! I found a solution.... the version 4.1.0 of the jde , MessageArgument accept new parameters.
But now i have a problem wuth the MDS simulator from the JDE 4.1.0, it doesn't work. ( this on from the 4.0 works always fine.)
I look into the configurqtion files, but the parameters are the same as in the previous version.
Somebody knows if their is something else to configure ?
thanks