Winsock message mixes after it received

I have a code which login ftp server

char servermessage[1000];
char username[] = "USER xxx\r\n";
char password[] = "PASS xxx\r\n";
recv(socket, servermessage, sizeof(servermessage),0);
memset(servermessage, 0, 1000);
send(socket, username, sizeof(username), 0);
recv(socket, servermessage, sizeof(servermessage), 0);
memset(servermessage, 0, 1000);
send(socket, password, sizeof(password), 0);
recv(socket, servermessage, sizeof(servermessage), 0);

printf(servermessage);