Correction, the last line of the configuration should be:

# ---
# OTRS configuration
# ---

# load mod_perl
LoadFile 'C:/PROGRA~1/OTRS/StrawberryPerl/perl/bin/perl510.dll'
LoadModule perl_module modules/mod_perl.so

# include the OTRS configuration
Include 'C:/PROGRA~1/OTRS/OTRS/scripts/apache2-httpd-new.include.conf'

# include the OTRS dev configuration
Include 'C:/PROGRA~1/OTRS/otrsdev/scripts/apache2-httpd-new.include.conf'

# ---

Thx b4..