[Robot Framework][RIDE]error: [Errno 10061] No connection could be made because the target machine actively refused it

Question

I'm using RIDE to connect to a remote server and execute a command, I have written the following code:

    *** Settings ***
Library           SSHLibrary

*** Variables ***
${HOST}           servername
${USERNAME}       username
${PASSWORD}       password

*** Test Cases ***
Remote
    ${index}=    Open Connection    ${HOST}
    Log Many    ${index}
    ${output}=    Login    ${USERNAME}    ${PASSWORD}
    Log Many    ${output}

I disabled firewall and run RIDE as administrator , but still have the error : error: [Errno 10061] No connection could be made because the target machine actively refused it

Any help with the case?

Thank you