[squid-users] limiting connection not working 3.1.4

I have squid 3.1.4 but using this conf, the rate limiting to 1Mbps does not seem to work.
What can I change in the conf / delay parameters?

auth_param basic realm Myname proxy server
auth_param basic credentialsttl 2 hours
auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/squid_passwd
authenticate_cache_garbage_interval 1 hour
authenticate_ip_ttl 2 hours
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 70          # gopher
acl Safe_ports port 210         # wais
acl Safe_ports port 1025-65535  # unregistered ports
acl Safe_ports port 280         # http-mgmt
acl Safe_ports port 488         # gss-http
acl Safe_ports port 591         # filemaker
acl Safe_ports port 777         # multiling http
acl Safe_ports port 1863         # MSN messenger
acl ncsa_users proxy_auth REQUIRED
acl maxuser max_user_ip -s 2
acl CONNECT method CONNECT
http_access deny manager
http_access allow ncsa_users
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access deny to_localhost
http_access deny maxuser
http_access allow localhost
http_access deny all
icp_access allow all
http_port 8080
http_port xx.xx.xx.xx:80
hierarchy_stoplist cgi-bin ?
cache_mem 100 MB
maximum_object_size_in_memory 50 KB
cache_replacement_policy heap LFUDA
#cache_dir aufs /var/spool/squid 40000 16 256
#cache_dir null /null
maximum_object_size 50 MB
cache_swap_low 90
cache_swap_high 95
access_log /var/log/squid/access.log squid
cache_log /var/log/squid/cache.log
cache_store_log none
buffered_logs on
acl QUERY urlpath_regex cgi-bin \?
cache deny QUERY
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%    1440
refresh_pattern .               0    20%     4320
quick_abort_min 0 KB
quick_abort_max 0 KB
#acl apache rep_header Server ^Apache
#broken_vary_encoding allow apache
half_closed_clients off
visible_hostname MyNameProxyServer
log_icp_queries off
dns_nameservers 208.67.222.222 208.67.220.220
hosts_file /etc/hosts
memory_pools off
client_db off
#coredump_dir /var/spool/squid
delay_pools 1
delay_class 1 2
delay_parameters 1 -1/-1 125000/125000
forwarded_for off
via off
Received on Mon Dec 05 2011 - 14:19:00 MST