I've been trying to access the on board diagnostics for my 325ti i have got the following setup:
2002 e46 325ti compact
prolific usb to rs232 convertor
"bmw compatible scanner v1.3.6"
BMWScan136 running on win7 in compatability mode xp sp3
when trying to scan the units in the software i get a error message of "hardware not ready. try again?" I got this error in every setting i tried e.g. having the ignition on/off etc
I've tried the good ol google and this turns up a load of other people having the same problem.
Any ideas what i'm doing wrong?