Help!

I have problems with 2 Command buttons Save and Revert :

I have a form with a PageFrame
On one page of this Page Frame I have 2 grids on 2 different WorkArea
I've put 2 series of New, Save, Revert, and Delete Buttons with differents Workarea parameters for each group of button

If I change something in one grid all the Save and Revert buttons are enabled... (Why not only those concerning one grid...)

If I press the Revert button I have an error :

Error in GetChildren Line 1
LParameters cWorkarea
Must specify additional parameters

I don't remember having this error before !

Thanks !

Gilles