Hello, I have a JV33-130 and I'm trying to downgrade the firmware from 5.0.1 to 2.20, I downloaded FWupdatetool3 along with the jv33_ts3 V2.20.rom file from http://tech.groups.yahoo.com/group/MimakiJV3Printers/, and when I try to update it gives me a error code "Cannot transmit the data. Check...