[squid-users] Connection refused in squidclient mgr:info

[Linux Man]

Hello all
I'm new using Squid
I downloaded 2.6 stable 6, then I compiled it and install
I'm using GNU-malloc.
I want to see some statistics, but when i do "squidclient mgr:info" in a
terminal, I get "client: ERROR: Cannot connect to localhost:3128: Connection
refused"
why? How can I solve it?
Thanks a lot!