[Dovecot] dovecot 2 doesn't start with managesieve

Hi

I build dovecot 2.0.16 and and dovecot-pigeonhole-0.2.5 on two machines with the same options. The config files are equivalent. On the first machine everything works fine - on the second dovecot with managesive won't start (without sieve protocol it does).

Error: socket() failed: Protocol not supported
Error: service(managesieve-login): listen(::, 4190) failed: Protocol not supported
Fatal: Failed to start listeners

I controlled the config, build pigeonhole a second time - nothing helps.

Any idea ? Is there a possibility to debug the start?

Nicola

...

plugin {

...

sieve = ~/.dovecot.sieve sieve_dir = ~/sieve }

protocols = imap pop3 sieve

...

service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } service managesieve { process_limit = 1024 }

...

protocol sieve { managesieve_max_compile_errors = 10 }