TidTcpserver ondisconnect

Can I use tcpclient connection or locklist method in Ondisconnect event of Tidtcpserver?
is this using cause any problem for Indy


procedure TfrmTcpserver.ServerDisconnect(AThread: TIdPeerThread);
begin

....
try
   frmSuperServer.TcpClient.connect;
   frmSuperServer.TcpClient.WriteStream( stream );
except
end;
...
with MyList.locklist do
try
....
finally
  MyList.unlocklist;
end;
end;