unsafe: Permission denied at sendmail start after AMAVISD ig

[ScalixB]

I followed the How-To at http://www.scalix.com/wiki/index.php?title=HowTos/Amavisd#Initscripts.2FSysconfig_files_for_amavisd-milter
to integrate amavisd into my new Scalix 11.1 server.
When I now try to start sendmail it fails with

Initializing SMTP port (sendmail)451 4.0.0 /etc/sendmail.cf: line 1589: Xmilter-amavis: local socket name /var/amavis/amavisd-miilter.sock unsafe: Permission denied
startproc: exit status of parent of /usr/sbin/sendmail: 71

The permission for /var/amavis/amavisd-milter.sock looks like follows

srwxr-xr-x 1 vscan vscan 0 Jul 12 01:37 amavisd-milter.sock

How do I get rid of this permission issue?