bos1714:
Usually the pin that the servo uses needs to be a PWM pin. Pins 1 and 2 are usually not PWM pins, which would indicate the issue.
You are confused, the Servo library works with any pin at all, analog(*) or digital (at least on the ATmega
Arduinos). Its an interrupt driven library, and is documented if you have a look...
Pin 1 is serial TX, it may be clashing due to this.
(*) For those analog pins that are also mapped to a I/O port.