You can't do it for several months.
http://www.tski.co.jp/baldio/patch/20010221a.html
Rangers:
Added Endure Cold at 22.
Added Skin Like Nature at 59.
Added FireFist at 22.
Moved Bramblecoat from 49 to 39.
Added Spikecoat at 49.
Added resist cold at 55.
Added Panic Animal at 22.
Moved Jolt to 51.
Moved Spirt of Wolf from 39 to 30.
Added Cinder Jolt (fire-based Jolt spell) at 55.
Offense and weapons skill made identical to warriors.
Added See Invisible at 39.