Default Probably bricked LG Optimus L7

I've been trying using KDZ to install a rootem V20D rom on my phone. I've installed msxml (until sp3), Windows Enabler, USB driver and all, but during the installation, I get Wparam:100 Lparam:1010 error
The phone gets stucked into Emergency Mode and I don't know how to go on. What should I do?