[AGENT++] error in sending request

[aymen amri]

Hi All

I'm trying to send a test Msg using the send_snmp_request function.
When I let the code by default running the code that I wrote doesnt apprear so I commented it

Firstly I declared needed variable As follows: 
    
    //declarations
    UdpAddress serv_adr;
    SnmpSocket sock_sn = socket(AF_INET, SOCK_STREAM, 0);
    unsigned char *test_buffer_to_send = (unsigned char*)"Test Msg \n";


Then I did the call of the function : 
   
    //affecting values of the server which has the role of SNMP MANAGER
    serv_adr = UdpAddress("172.16.125.19");
    
    //sending an snmp request to the srever
    send_snmp_request(sock_sn,test_buffer_to_send,10,serv_adr);

but nothing is shown in the server application and what I get in Execution Is :
the date and time:6040:(1)DEBUG : ++ SNMP++: sending to 172.16.125.19/0:
the date and time:6040:(3)DEBUG : 54 65 73 20 4D 73 67 20 0A
the date and time:6040:(1)DEBUG : Error sending packet : No error

Is there any wrong step in my code,and what Shall I do if want to test to send a trap

Thanks
Best Regards