Inventory problem

I install ocs server 2.1.2 for Windows on Windows 2012 r2 server , the client is ocs agent 2.1.1.3 or 2.1.1.2 on Windows 7 or 10. On the server ocs display ther server machine. But ocs does'nt display pc machine.

I send you oca agent log.

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Starting OCS Inventory NG Agent on Thursday, April 27, 2017 13:46:29.
AGENT => Running OCS Inventory NG Agent Version 2.1.1.3
AGENT => Using OCS Inventory NG FrameWork Version 2.1.1.3
AGENT => Loading plug-in(s)
 DLL PLUGIN => Searching for Plug-in DLL(s) in folder <C:\Program Files (x86)\OCS Inventory Agent\plugins>
 DLL PLUGIN => 0 DLL Plug-in(s) successfully loaded on 0 DLL(s) found
AGENT => Using network connection with Communication Server
 COM PROVIDER => Loading Communication Provider <C:\Program Files (x86)\OCS Inventory Agent\ComHTTP.dll>
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.1.1.3>
 AGENT => Sending getLabel request
 COM SERVER => Initializing cURL library for getFile
 COM SERVER => Using cURL without server authentication
 COM SERVER => Disabling cURL proxy support
 COM SERVER => Disabling cURL SSL server validation support
 COM SERVER => Sending fileGet request to URL <http://172.16.66.202/ocsinventory/deploy/label>
 WARNING *** COM SERVER => Failed to send HTTP Get request <Couldn't connect to server>
 COM SERVER => Cleaning cURL library
 AGENT => Failed to retrieve Label <Couldn't connect to server>
AGENT => Sending Prolog
 DID_CHECK => Read DeviceID <PO-DSI-01-2017-04-26-11-28-44> and MACs <18:4F:32:FD:CF:6020:47:47:4F:66:381A:4F:32:FD:CF:5F18:4F:32:FD:CF:5F> in file <ocsinventory.dat>
 COM SERVER => Initializing cURL library for sendRequest
 COM SERVER => Using cURL without server authentication
 COM SERVER => Disabling cURL proxy support
 COM SERVER => Disabling cURL SSL server validation support
 COM SERVER => Sending HTTP Post request to URL <http://172.16.66.202/ocsinventory>
 WARNING *** COM SERVER => Failed to send HTTP Post request <Couldn't connect to server>
 COM SERVER => Cleaning cURL library
ERROR *** AGENT => Failed to send Prolog <Couldn't connect to server>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:45.

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