[imp] Problem in compose messages with horde-3.1.4 and imp-4.1.4

[Wilson Rogerio Lopes]

Hi all,

I'm running  horde-3.1.4 and imp-4.1.4, and when i try to send a mail this message
occur:

"There was an error sending your message: Unable to find class for driver"


Running the test.php, it seems to be everithing OK

IMP Version

    * IMP: H3 (4.1.4)

Other Horde Applications

    * gollem: No
      Gollem provides access to local VFS filesystems to attach files.
    * ingo: No
      Ingo provides basic mail filtering capabilities to IMP.
    * nag: No
      Nag allows tasks to be directly created from e-mail data.
    * turba: No
      Turba provides addressbook/contacts capabilities to IMP.

PHP Version

    * PHP Version: 5.2.3
    * PHP Major Version: 5.2
    * PHP Minor Version: 3
    * PHP Version Classification: release
    * You are running a supported version of PHP.

PHP Module Capabilities

    * IMAP Support: Yes
    * OpenSSL Support: Yes

Miscellaneous PHP Settings

    * file_uploads enabled: Yes

Required IMP Configuration Files

    * config/conf.php: Yes
    * config/mime_drivers.php: Yes
    * config/prefs.php: Yes
    * config/servers.php: Yes

PEAR

    * PEAR Search Path (PHP's include_path):  /usr/local/apache/htdocs/horde/lib:.:/usr/local/lib/php
    * PEAR: Yes
    * Recent PEAR: Yes
    * HTTP_Request: Yes
    * Auth_SASL: Yes


Any suggestions?

Cheers,
Wilson.