mic0 connection problem

I would used mic0 through ssh, but suddenly doesnt it work.  

[----@localhost ~]$ micctrl -s
mic0: online (mode: linux image: /usr/share/mpss/boot/bzImage-knightscorner)
[----@localhost ~]$ ssh mic0
ssh: connect to host mic0 port 22: Connection timed out

So, I restared mic0 using mpss command ( service mpss restart )

but same error happen. This error happend  in the old day, at that time, I just resetting mic0 configuration.

It would be okay if resetting mic0, but I dont wanna do it becaused of many configurations.

I will really appriciate to anyone who help me.