Same problem here.
Everything was ok. iphone 3G FW 3.0.1, jailbreaker ... ifunbox, SSH working

I was trying to solve a problem with itunes that some days ago doen't sync and I reinstall itunes, reinstall Windows driver, uninstall and reinstall USB Apple driver and so on ...

So in one moment, my Total Commander Plugin doesn't work in some paths (var/private ...), I've tried ifunbox and DiskAid and they said that I need to Jailbreak and my FW was 1.2

In my iphone everything is all right, I can sync with itunes and it said that my FW was 3.0.1. I could use WinSCP to explore every path in iphone via Wifi, but not with USB, itunnel

I don't know nothing about jailbreak (a friend made to me) and nothing about what to do with "lockdown", I don't have a backup of this archives

What can I do?
Thanks