AppleTV sees my Mac Mini but It can't its information

i have latest version of mac mini updated software on apple tv 2. can see mac mini when try access it's information itunes open says loading errors out. can ping mac mini apple tv. have latest version of itunes.

macbook pro , mac pro can accessed on apple tv. 3 running lion latest updates.

mac mini did @ 1 time work on apple tv. firewall off on mac mini.

suggestions mac mini , apple tv work again appreciated.

 

can other macs see itunes contents? if have itunes open macs , belong same home sharing (also same lan), other macs should able access mac mini's itunes library , it’s content, if not, maybe mac mini's isn’t share right. if can access them successfully, can start troubleshoot apple tv.

 

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