Well, I've uninstalled TSL, and figured out what the problem was. After unninstalling everything, I used regedit to delete all data regarding TSL out of my computer.
After that, reinstalled everything, installed only USM, and i finally was able of producing the sabers on the bench.
Unninstalled, reinstalled, installed the RCM (strangely, the installer didn't work. had to use the TSL patcher version.), installed the USM with Stoney's patcher, and it works.
Problem solved, it seems I'm going back to this game again xD
Thank's a lot for the support guys