General :: Samsung GT-S5570 Will Not Fully Root

I've attempted to root my girlfriends phone for her so I can unlock it, but the phone just wont root. I've tried superoneclick and a ton of other 1 click roots along with the manual rooting at first (where you go into recovery mode and apply the update from the sd card).

I can see the superuser app, however I cannot grant superuser access to any apps. The version is v2.3.6 and if it makes a difference, it's an irish phone locked to use meteor (a network).

I've also downloaded rootchecker from the play store and it says that I do not have "proper root access to the phone" or something similar. Proper was the predominant word though.Whenever I use superoneclick, the application always freezes as well.

I can do the unlocking half of it myself, I just need root access..Also, when in recovery mode, this comes up in yellow at the bottom.