Jailbreak PW2 serial 9017

Current firmware version:5.4.3.2

Connected to the wifi for a few seconds to register.Then it has been in airplane mode.

http://wiki.mobileread.com/wiki/PW2_...W2_to_2014-PW2

This guide is confusing.

First it tells to downgrade to 5.4.3 if firmware is between 5.4.5 and 5.5.0

then agan it tells to upgrade to 5.4.5 if serial 9017

i have serial 9017

can someone tell what exactly to do?