esc and arduino

I want to control my rc car that I have with the arduino. I tried doing it with the servo library. the first thing I did is turn of the reverse function on the esc so that I didn't put the car in full forward then full reverse by accident. anyway I tried it sending different values, but every value put the motor at its max speed. I used servo.write() and sent values between 0 and 180. have you guys tried using and esc with the arduino??

I'm using this esc: http://www.tamiyausa.com/pdf/manuals/45029ml.pdf