Harmony Binding not works :(

What am I doing wrong?

2016-12-02 17:52:12.577 [ERROR] [o.o.c.s.ScriptExecutionThread ] - Error during the execution of rule ‘tv’: No client ‘’ defined

openhab .cfg

harmonyhub:discoveryName=Harmony Hub
harmonyhub:host=192.168.178.136
harmonyhub:username=******
harmonyhub:password=******

rule "tv"
when
Item TV received update ON
then

harmonyStartActivity(“Fernsehen”)

end

+++
String TV_HDMI_an “HDMI an” { harmonyhub=">[start:Kamera]" }
String TV_an “TV an” { harmonyhub=">[start:Fernsehen]" }
//String TV_aus “TV aus” { harmonyhub=">[start:PowerOFF]" }
String TVMute “Mute” { harmonyhub=">[press:Samsung TV:Mute]" }

Switch HDMI "HDMI ein"
Switch TV "TV ein"
Switch Mute “Mute”
++++