Question Won't install drivers from download mode

Hello guys,

I searched on the net but didn't find any answers. I'll try to be clear : Today I flashed my international G2 with the LG flash tool. Everything worked fine. Then, when I tried to put a new rom on the phone (by using a custom recovery), I made a mistake and soft-bricked the LG. Now I can still access to the download mode, but the tool doesn't work anymore when i plug the phone in download mode. I tried to reinstall the drivers, but my computer doesn't seem to see anything...

What's wrong ?

Precision : At each time, my phone was rooted, but this morning when I succeed, nothing was written in the download mode and now, I see the word "rooted" in the bottom of the screen.