Trouble with PWM pins

hello , thank in advance may give.

bellow mycode. problem myservo.attach(10) causes 1 of 2 motors not turn. long don't include in code have no problems either motor. can't pwm function on pins 3, 5, , 6 work; not motors or servos. doing wrong?

code: [select]


#include <servo.h>

int lmotord_pin = 8;  
int rmotord_pin = 12;
int rmotorpwm_pin = 9;
int lmotorpwm_pin = 11;


servo myservo;

void setup()
{  
 pinmode(lmotord_pin, output);
 pinmode(rmotord_pin, output);
 
 myservo.attach(10);
 myservo.write(5);
 delay(2000);
}

void loop()
{

  digitalwrite(rmotord_pin, high);
  digitalwrite(lmotord_pin, high);
  analogwrite(lmotorpwm_pin, 100);
  analogwrite(rmotorpwm_pin, 100);

}



read
http://arduino.cc/en/reference/servo

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