Tcp/IP comm between Awe Core and Server, "Can`t connect to target"

Hello,

I trying to implement a Tcp/IP communication between AweCore in our Hardware (STM32F769), and beetween AweServer.
I allways get a pop-up message: "Can`t connect to target", but in servers message tab I have an info: "Successfully connected to target.  Waiting for script commands...", and in error tab, there is no any message.

I have an AWE Designer Version: 8.B.1.3 STMicro. When in this program I push run button,than I get message:
"Could not find target. Check Server connection to target."

In my HW, I can handle TCP/Ip message from Awe Server.
- I fill packet buffer with received data 
  (8 bytes: Data is: 2c:00:02:00:2c:00:02:00), and I call:
   awe_packetProcess(&g_AWEInstance);
- Than I sent back the data from packet buffer
(whole 1056 bytes: Data is: 00:00:03:00:c5:ff:ff:ff:c5:ff:fc:ff:6e:75:04:00:07:00:00:00:08:00:00:00:09:00:00:00:0a:00:00: only zeros from here)   

On a second packet from server
  (8 bytes: Data is: 29:00:02:00:29:00:02:00), I responded by:
  (whole 1056 bytes: Data is: 00:00:0e:00:00:00:00:00:00:00:fa:45:60:fe:4d:4d:20:10:00:00:64:02:02:0a:01:03:42:08:07:01:00:00:53:54:33:32:46:37:36:39:60:fe:4d:4d:00:00:00:00:49:5c:6b:7a:1e:2f:da:36:00:00: only zeros from here)
  
After that I get FIN,ACK message from server

Where is the problem? 

Can I find any error logs somewhere? 

How can I set the correct length of response message? Now I sending the whole response buffer.

Thanks.