[otrs] Can not send email to customer

[Coagent]

Hi everybody,

I have installed the OTRS 2.2, and then have configed send all email using
SMTP relay via the graphical administration frontend.
Now I try to send an email for a ticket, I get an error message as below,
Software error:

Unknown callback: 'authname'. (user|auth|language|pass)

 For help, please send mail to the webmaster ([no address
given]<%5Bno%20address%20given%5D>),
giving this error message and the time and date of the error.

What's happen? why?
I have tested the SMTP server via an email client, it works, so I don't know
why can not send email.
BTW, I have checked the Perl Modules by use the script otrss.checkModules,
reponse result information as below:
                CGI ... ok
         Date::Pcalc ... ok
        Date::Format ... ok
                 DBI ... ok
          DBD::mysql ... ok
         Digest::MD5 ... ok
    Crypt::PasswdMD5 ... ok
      LWP::UserAgent ... ok
          IO::Scalar ... ok
            IO::Wrap ... ok
        MIME::Base64 ... ok
         MIME::Tools ... ok
      Mail::Internet ... ok
            Net::DNS ... ok
           Net::POP3 ... ok
            Net::LDAP ... not installed! (for directory authentication - not
required)
           Net::SMTP ... ok
        Authen::SASL ... ok
                  GD ... ok
            GD::Text ... ok
           GD::Graph ... ok
    GD::Graph::lines ... ok
     GD::Text::Align ... ok
         XML::Parser ... ok
           PDF::API2 ... ok
      Compress::Zlib ... ok

Do you know why about this problem?

Thanks and Regards,
Coagent
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