Delphi : Field 'False' not found. occurred only on my computer

I have a TCustomClientDataSet (in memory) which is used to do some filtering in a Delphi program.

My filtering code look like :

  CDSFilteredGroup.Filter := 'ACP_type = 1 AND ACP_by_default <> False';
  CDSFilteredGroup.Filtered := True;

When I compile and run it, I got the following error only with Delphi (XE4) installed on my computer :

CDSFilteredGroup: Champ 'False' non trouvé.

Translation: Field 'False' not found. The same code compile and run perfectly fine on my colleagues computers, but not on mine. There must be an option somewhere that I miss, any idea ?

Remember, the code is ok and working...