avrdude: verification error, first mismatch at byte 0x0100

i made program 6 flex sensors 6 servos
yesterday working  perfect
to today not
down of code saw message


[font=verdana][font=verdana]avrdude: verification error, first mismatch @ byte 0x0100
        0xfe != 0xff
avrdude: verification error; content mismatch
[/font][/font]

what means , have run again ?

please help

 program

quote

#include <servo.h>

servo myservo0;  // create servo object control servo
servo myservo1;  // create servo object control servo
servo myservo2;  // create servo object control servo
servo myservo3;  // create servo object control servo
servo myservo4;  // create servo object control servo
servo myservo5;  // create servo object control servo

int potpin0 = 0;  // analog pin used connect potentiometer
int potpin1 = 1;  // analog pin used connect potentiometer
int potpin2 = 2;  // analog pin used connect potentiometer
int potpin3 = 3;  // analog pin used connect potentiometer
int potpin4 = 4;  // analog pin used connect potentiometer
int potpin5 = 5;  // analog pin used connect potentiometer

int val0;    // variable read value analog pin

int val1;    // variable read value analog pin

int val2;    // variable read value analog pin

int val3;    // variable read value analog pin

int val4;    // variable read value analog pin

int val5;    // variable read value analog pin

void setup()
{
 myservo0.attach(9);  // attaches servo.0 on pin 9 servo object
 myservo1.attach(10);  // attaches servo.1 on pin 10 servo object
 myservo2.attach(11);  // attaches servo.2 on pin 11 servo object
 myservo3.attach(6);  // attaches servo.3 on pin 12 servo object
 myservo4.attach(5);  // attaches servo.4 on pin 13 servo object
 myservo5.attach(3);  // attaches servo.5 on pin 14 servo object

}

void loop()
{
 val0 = analogread(potpin0);            // reads value of potentiometer (value between 0 , 1023)
 val0 = map(val0, 350, 800, 300, 0);     // scale use servo (value between 0 , 180)
 myservo0.write(val0);                  // sets servo position according scaled value
 delay(0);                           // waits servo there
 
  val1 = analogread(potpin1);            // reads value of potentiometer (value between 0 , 1023)
 val1 = map(val1, 350, 800, 300, 0);     // scale use servo (value between 0 , 180)
 myservo1.write(val1);                  // sets servo position according scaled value
 delay(0);
 
  val2 = analogread(potpin2);            // reads value of potentiometer (value between 0 , 1023)
 val2 = map(val2, 350, 800, 400, -100);     // scale use servo (value between 0 , 180)
 myservo2.write(val2);                  // sets servo position according scaled value
 delay(0);
 
  val3 = analogread(potpin3);            // reads value of potentiometer (value between 0 , 1023)
 val3 = map(val3, 350, 800, -100, 300 );     // scale use servo (value between 0 , 180)
 myservo3.write(val3);                  // sets servo position according scaled value
 delay(0);
 
  val4 = analogread(potpin4);            // reads value of potentiometer (value between 0 , 1023)
 val4 = map(val4, 350, 800, -170, 500);     // scale use servo (value between 0 , 180)
 myservo4.write(val4);                  // sets servo position according scaled value
 delay(0);
 
  val5 = analogread(potpin5);            // reads value of potentiometer (value between 0 , 1023)
 val5 = map(val5, 350, 800, 700, 0);     // scale use servo (value between 0 , 180)
 myservo5.write(val5);                  // sets servo position according scaled value
 delay(0);
 
}

code: [select]

  delay(0);
nothing problem, stupid nonetheless.

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