ROUNDCUBE NOT OK

[doc-ordi31]

Hello mi french to all and to all
I just almost finished configure my Debian server , the problem that arises is how to install the new package that I managed to miss 3 that was on NOT NOT OK Failed to load class but not others

Code:
PEAR:  OK
Auth_SASL:  NOT OK(Failed to load class Auth_SASL from pear.php.net)
Net_SMTP:  OK
Net_IDNA2:  NOT OK(Failed to load class Net_IDNA2 from pear.php.net;
Mail_mime:  OK
Mail_mimeDecode:  OK
Net_LDAP3:  NOT AVAILABLE(Recommended to install Net_LDAP3