ZX-SERVO16i change Baudrate

#include <ipst.h>
int i=0;
char x[13];
void setup(){
  // Send Reset Command
  out(17,0);delay(100);
  out(17,1);delay(1000);
  // Baudrate 2400
  Serial1.begin(2400);
  // Read ZX-SERVO16i Version
  Serial1.println("!SCVER?");
  while(!Serial1.available());
  delay(300);
  while(Serial1.available()>0){
    x[i]=Serial1.read();
    i++;
  }
  // Show at GLCD line 1
  glcd(0,0,x);
  i=0;
  // Change ZX-SERVO16i baudrate to 38400
  Serial1.print("!SCSBR");
  Serial1.write(1);
  Serial1.write(0x0D);
  Serial1.write(0x0A);
  delay(1000);
  // Change baudrate to 38400
  Serial1.end();
  Serial1.begin(38400);
  // Check VERSION again
  Serial1.println("!SCVER?");
  while(!Serial1.available());
  delay(100);
  while(Serial1.available()>0){
    x[i]=Serial1.read();
    i++;
  }
  // Show GLCD line 3
  glcd(2,0,x);
}
void loop(){}