2 servos causing problems?

hi. Sorry about that. Here it is but its an exact copy of the example code for the one servo sweep but with 2 servos.
Thanks so much.

#include <Servo.h>

Servo myservo1; // create servo object to control a servo
Servo myservo2; // create servo object to control a servo
// twelve servo objects can be created on most boards

int pos = 0; // variable to store the servo position

void setup() {
myservo1.attach(8); // attaches the servo on pin 9 to the servo object
myservo2.attach(9); // attaches the servo on pin 10 to the servo object
}

void loop() {
for (pos = 90; pos <= 0; pos += 1) { // goes from 0 degrees to 180 degrees
// in steps of 1 degree
myservo1.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
for (pos = 0; pos <= 90; pos += 1) { // goes from 0 degrees to 180 degrees
// in steps of 1 degree
myservo1.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
for (pos = 90; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
myservo2.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position

}

for (pos = 0; pos >= 90; pos -= 1) { // goes from 180 degrees to 0 degrees
myservo2.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
}