Thnx to all replies, i finally got rid of those error messages, it seems that it wasnt recognising the patch sys file, i had to disable the nt/2k/xp driver from the settings then i restarted ic-prog and enabled the driver again and this time it asked me if i wanted to install the patch so i accepted and restarted w/o errors but... when i tried to finally program the PIC i got the 0000h memory verification error, so now im afraid that my com port wont work with JDM, how do i make those voltage measures to test the com port compatibility with JDM?.