Error digest failure

[Silvia]

I have a program that verifies signature written using openssl-0.9.6. It
works fine, but when I compile it with Openssl 1.0.1c, when I test it with
the same token
 I have this error:
    PKCS7_signatureVerify:digest failure

The digest that retrieves EVP_DigestFinal_ex is different in both versions,
do you know what could it be?

Thank you,
Silvia