Delphi 2005, Error using ADO

From: "Gregory" <contact@xxxxxxxxxxxxx>
Date: Mon, 25 Apr 2005 09:39:32 +0200

When I select a ADO component and drop it on a Winform I get the following
message :

"La création d'une instance de 'Borland.Vcl.TADOConnection' a échoué, car
'System.MissingMethodException: Constructor on type
Borland.Vcl.TADOConnection not found.
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder
binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr,
Binder binder, Object[] args, CultureInfo culture, Object[]
activationAttributes)
at Borland.Studio.Host.CreationManager.a(Type , Object[] , Type[] ,
Boolean )'."

(It's the french version) Does some one know how to correct this? Is it
possible to reinstall these components ?
I have juste freshly instaled Delphi 2005 and have added the first update.

Thank's

Greg

.

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