720 user code

hi
i have one 720 and its usb cable (for this phone and other models), i can't read the user code, normally i use victor 323 cracked for read this information in c3xx series but with this phone when i plug in the cable appears in the computer that new device have been found and need drivers, then i do like i did it in the c3xx series and i select the place where is the p2k drivers but it tells to me that it can't find drivers.
i have installed the usb drivers for this phone but is imposible.
if somebody can tell me where is the problem or if there is another soft that i can use with the usb cable to read this phone i'll be grateful
thanks