Is there a code to enter on the PS3 to make Capt. Jack invincible?

I read where there is an unconfirmed code of:
" at the meain menu push and hold L2 & R@ and insert the following:
x, triangle, triangle, square, L1, R1.

But this doesn't seem to work. Not for me, anyhow.

Thanks for any info.
Ed

Yes, I've tried it several times, and it "seems" to take. When finished entering the codes, a Pirate says "Aaaaarghhh". so I assume that something has happened.

Problem is, when I play, nothing changes. If Jack Sparrow dies, the game still puts me back at the beginning of whatever chapter I was in and I have to start that part over again.

How do I get the "invincible" part to work? so I can get further in the game?

Ed

Tried using the code and starting a new game fresh, but it does not seem any different when sword fighting than without using the code.

I still get haven't been able to get by onslaught of soldiers after getting past main street in Tortega. Sparrow gets "killed" every time, and I have to keep trying that segment until I can get through it.
THe "invincible code" does not help.