Difficulty to create a streaming network...

I would like to try to stream from my iMac to my ATV. I have first tied this

http://wiki.atvflash.com/index.php?title=Network_Streaming and got this error message :

mount smbfs : can’t get server adress
EMAC.LOCAL unknown hot
mount smbfs : can’t get adress
sysrv = networks down

Si I tried to connect a network that was already created by default and get this error message :

AFP is not enable or is missing essentials components, smart installer with 1.0 recovery.dmg in -/documents will fix this issue.

So I tried

http://wiki.atvflash.com/index.php?title=Enable_AFP

nothing stil work !?!?!?

Is there anyone who can help me ?

Thanks in advance

There may be an error in the settings you have entered in the Manual Share Point. We can look your settings over if you send us an email here: http://www.atvflash.com/contact.php