erro ao executar squid -k reconfigure unrecognized: 'delay_

compilei com a opcao delay pools mas ta dano erro :

/var/spool/squid/sbin/squid -v
Squid Cache: Version 2.5.STABLE12
configure options: --prefix=/var/spool/squid/ --enable-delay-polls --enable-cache-digests --enable-poll --disable-ident-lookups --enable-truncate --enable-removal-policies --enable-arp-acl

o erro é:

/var/spool/squid/sbin/squid -k reconfigure
2005/12/02 13:50:41| parseConfigFile: line 3009 unrecognized: 'delay_pools 2'
2005/12/02 13:50:41| parseConfigFile: line 3010 unrecognized: 'delay_class 1 2 '
2005/12/02 13:50:41| parseConfigFile: line 3011 unrecognized: 'delay_class 2 2'
2005/12/02 13:50:41| parseConfigFile: line 3056 unrecognized: 'delay_access 1 all ow controle1'
2005/12/02 13:50:41| parseConfigFile: line 3057 unrecognized: 'delay_access 2 all ow controle2'
2005/12/02 13:50:41| parseConfigFile: line 3105 unrecognized: 'delay_parameters 1 -1/-1 -1/-1'
[/b]