no SASL mechanism found

[hermelin]

Hi all,
I am using OTRS 3.0.4 installed on WXP. I am trying to connect it to our Exchange server, however, everytime I try to send admin notification I'll get this error message:
No SASL mechanism found
at C:/PROGRA~1/OTRS/OTRS/Kernel/cpan-lib/Authen/SASL.pm line 77
at C:/Program Files/OTRS/StrawberryPerl/perl/lib/Net/SMTP.pm line 143

Is it some additional module which needs to be installed separately? Or did I just omit something in SendMail configuration?
Thanks a lot for help.
Jaromir