Servo attach causes motor controller to fail

I have the Duemilanove. I have a dual motor controller and two servos. The problem I’m having is that when I attach to the servo pin in my code one side of the motor controller stops working (i.e. right work but left does not). My problem is code based I believe because if I remove the lines “tiltServo.attach(_tilt)” and “panServo.attach(_pan);” both side of the motor controller work again. Is this a code problem or some limitation in how the Arduino uses PWM?

#include <Servo.h> 

//Motor pin setup
const int _R_InA = 9;
const int _R_InB = 8;
const int _R_PWM = 11; 
const int _L_InA = 7;
const int _L_InB = 6;
const int _L_PWM = 10; 
//Servo pin setup
const int _pan = 3; 
const int _tilt = 5; 

Servo tiltServo;
Servo panServo;

void setup()
  tiltServo.attach(_tilt); << Kills one side of motor control
  panServo.attach(_pan);   << Kills one side of motor control
  //Motor forward
  pinMode(_L_InA, OUTPUT);
  pinMode(_L_InB, OUTPUT);
  pinMode(_L_PWM, OUTPUT);
  pinMode(_R_InA, OUTPUT);
  pinMode(_R_InB, OUTPUT);
  pinMode(_R_PWM, OUTPUT);

void loop()
  digitalWrite(_L_InA, LOW);
  digitalWrite(_L_InB, HIGH);
  analogWrite(_L_PWM, 80);
  digitalWrite(_R_InA, LOW);
  digitalWrite(_R_InB, HIGH);
  analogWrite(_R_PWM, 80);

Doh!! Never mind!

On boards other than the Mega, use of the library disables analogWrite() (PWM) functionality on pins 9 and 10, whether or not there is a Servo on those pins.