Rooting using kingo worked but could not partition sd card.

Hi everyone, newbie here . Will.
I have a Samsung galaxy y Gt-S5369.
Android version 2.3.6.
Base band version S5369BULL1 .
Kernel version 2.6.35.7.dpi @ Dell172#1. Mon Dec 3 16:30:31 Ist 2012. Build number GINGERBREAD .BULL1.
Recently I have tried rooting my phone to no avail.
I used kingo app to root and got super user access I installed busy box, link2sd cwm and aparted but could not partition sd card for expansion but it said su binary not updated..

So my question is , is my phone fully rooted ?
And why can't I partition my sd card so I can expand using link2 sd card ?

I am probably leaving out a lot of detail but i hope it's enough to get my problem started to been resolved .
Kind regards.
Will.:):o