Certificat v3 not supported

Hi,

I just signed a PDF with a V1 and a V3 certificat.

The V1's certificate is successfully recognized and all informations appear, but with the V3, it say that the signature have been made by unknown.

When I try to valide the signature, I got this error:

Erreur d'authentification de la signature.  

Erreur lors de la validation :  

Erreur de chiffrement interne de la bibliothèque.
Code d'erreur: 0x2726

Sorry but it's in french, so this is a translation:

Error of signature authentification.

Error while validation :  

Error of internal library encryption.
Error code: 0x2726

(I have the latest version of Adobe Acrobat Reader)