this is my first post on your forum but i think any help with this problem needs to be passed around.
i too have come across this problem with my brothers connection he is on supanet though
however i have fixed it by downloading the patch using his ps2 on my connection then when he connects using his connection all is well
it seems as if ntl and supanet and maybe more isps are corrupting or in some way stopping the patch installing correctly on the ps2 i tried coping the patch from my ps2 to his but this didnt work so if you know a person near where you live with a adsl connection see if they will let you download the patch to your ps2 using there connection it cant help and it may work it did eith my brothers ps2 on supanet.
its worth a try you may get some swbf online play again...
i hope it works for all who read this.