No data is available in the "Latest Data" tab in Front End

[partha]

Hello,

I am new to using Zabbix platform and I am stuck at a situation where I have performed all the necessary steps and yet I am not able to see any data in the "Latest Data".

Following are the details:

Zabbix is installed in a Linux server and is running(IP: xx.xxx.xx.133). I installed a windows agent in my personal laptop (IP: xx.xx.xx.6 and Hostname: TGST480S008).
I am able to Telnet from 133 to 6 via 10050 port.
I am able to Telnet from 6 to 133 via 10050 and 10051 ports.

Sometimes, the availability in the front end for the configured Agent (Host) is red and sometimes its green. Whenever its green, I am not getting any data in the "Latest Data".
In the Agent logs, I am getting this error message:
"active check data upload to [xx.xx.xx.133:10051] started to fail ([connect] cannot connect to [[xx.xx.xx.133]:10051]: Connection refused.)"

My Config File reads the Following:

LogFile=C:\Program Files\Zabbix Agent\zabbix_agentd.log
Server=172.31.12.133
ServerActive=172.31.12.133
Hostname=TGST480S008
Include=C:\Program Files\Zabbix Agent\zabbix_agentd.conf.d\

Please let me know if I am going wrong somewhere.