Can't login through API after changing IP

[kotakomputer]

After changing Proxmox IP then login using API was failed, but using Web UI fine (Hostname still same, only IP changed).
Any idea?

  $pve2 = new PVE2_API($svr_ip, $svr_username, 'pam', $svr_password);
  
  if ($pve2->constructor_success()) {
    if ($pve2->login()) {
      ........... 
    else {
      $result  = "Login to Proxmox Host failed. IP: $svr_ip. Username: $svr_username.";  
    }

 

[sdutremble]

Did you also change the hosts file?

Serge

 

[kotakomputer]

Did you also change the hosts file?

Yes, IP in /etc/hosts has replaced with new IP.
NB: I'm using IP address to connect to Proxmox in PHP Code