Reader crash by trying to download crl

Hello,

we use the Reader 11.0.23 (effect seems to belong all 11.0.x)

If we open a PDF-File with a digital signature, The Reader tries to download the crl for the certificate via http or ldap. Our desktops don't have a connection to the internet, so the download fails.

The Reader freezes until the timeout of the download has expired. This takes too long for our users.

The Reader DC have the same problem, but without freeze.

How can we centrally disable this check of the crl for all desktops? GPO/Registry?

Thanks

Micha Boschke