[Koha] Link authorities to biblios

[julionogueira at sapo.pt]

Hi,

I want to link auth to biblio records (Koha3.14.07) with 'export  
PERL5LIB=/usr/share/koha/lib/C4/Context.pm;export  
KOHA_CONF=/etc/koha/sites/koha/koha-conf.xml;/usr/share/koha/bin/link_bibs_to_authorities.pl', but it doesn't  
work.
Could somebody please tell me what I'm doing wrong?
Gratefull in advance,
Julio