JB update- please HELP

Hello.

I'm a new owner of a Samsung Galaxy S3 and I need your help.
If I connect my phone to Kies then the folowing text is displayed:

PDA: LF5 / PHONE: LF5 / MODEM: LF2 (VDH).

Then if I go to check the last software for the VDH models, on samsung firmware site, a new version (4.1.1) apears.

My question is why this update does not apear on my phone or on Kies?
I curently have the 4.0.4 firmware on my phone.

Thank you.