Problems with key

Hi, I try to add the kex like you write: apt-key adv --keyserver keyserver.quickbuild.pearsoncomputing.net --recv-keys 2B8638D0 But the server doesn't answer: Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.EYtoNu4iT2 --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver keyserver.quickbuild.pearsoncomputing.net --recv-keys 2B8638D0 gpg: Schlüssel 2B8638D0 von hkp-Server keyserver.quickbuild.pearsoncomputing.net anfordern ?: keyserver.quickbuild.pearsoncomputing.net: Connection timed out gpgkeys: HTTP fetch error 7: couldn't connect: Connection timed out gpg: Keine gültigen OpenPGP-Daten gefunden. gpg: Anzahl insgesamt bearbeiteter Schlüssel: 0 Bye Gregor --