problem talking to server 127.0.0.1:7777: Connection refused

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Hi,
I just install the new version of iredmail, and when i send mail i have this error:  warning: problem talking to server 127.0.0.1:7777: Connection refused

Than i do this: /etc/init.d/iredapd start
So i can send messages, but the iredap it's stop again....

Please can u help me.
Thank's
NB: In the old version of iredmail, i dont have this error..