Hi, I've tried to perfom a Radius Authenication for my OTRS Customer Users. I've changed my Frontend::Customer::Auth throughout Sysconfig Option in the admin web interface like described in the Admin Manual (ver. Otrs 2.3.4) But it didn't work. Then I've tried to edit my config.pm and I inserted these line: # This is a example configuration to auth. customer against a radius server $Self->{'Customer::AuthModule'} = 'Kernel::System::Auth::Radius'; $Self->{'Customer::AuthModule::Radius::Host'} = 'radiushost'; $Self->{'Customer::AuthModule::Radius::Password'} = 'radiussecret'; ..changing the appropriate parameters with my data. But it didn't work. The log is: [Fri Oct 2 11:51:18 2009][Error][Kernel::System::CustomerAuth::new][81] Can't load backend module Kernel::System::CustomerAuth::Radius! [Fri Oct 2 11:51:18 2009] Radius.pm: Can't locate Authen/Radius.pm in @INC (@INC contains: C:/Program Files/OTRS/Apache/bin/../../Kernel/cpan-lib C:/Program Files/OTRS/Apache/bin/../.. ../../ C:/PROGRA~1/OTRS/OTRS/Kernel/cpan-lib C:/PROGRA~1/OTRS/OTRS/ C:/Program Files/OTRS/StrawberryPerl/perl/lib C:/Program Files/OTRS/StrawberryPerl/perl/site/lib . C:/Program Files/OTRS/Apache C:/Program Files/OTRS/Apache/bin/../.. C:/Program Files/OTRS/Apache/bin/../../Kernel/cpan-lib) at C:/PROGRA~1/OTRS/OTRS//Kernel/System/CustomerAuth/Radius.pm line 18. [Fri Oct 2 11:51:18 2009] Radius.pm: BEGIN failed--compilation aborted at C:/PROGRA~1/OTRS/OTRS//Kernel/System/CustomerAuth/Radius.pm line 18. Someone told me that maybe I haven't installed "Authen::Radius" on my system. I've a Windows sytem. How can I check if I've this installed? If I haven't it, how can I perform this installation? I have found on the web that the installation is via CPAN but I don't know how to use it. Thanks a lot, Alessandro