Are you using CyUSB.sys or ezusb.sys?
Are you using Windows 7 32-bit to 64-bit OS?
The 64-bit version does not allow unsigned driver to be installed (or load to system folders it gives error during installation, I'm surprised it is even allowing you to copy the files.
thanks for your reply, Aasi.
i am using ezusb.sys, not CyUSB.sys.. under using windows 7 32bit platform.
because ezusb.sys need the guider driver ezloader.sys. that's why i said this driver are two steps.. with one inf file.
when i use devcon.exe with inf as parameters, the program can find the ezloader.sys correctly, but when i plug in the usb cable, it won't find the second part. (i am sure the correct vid/pid are already downloaded into the chip throuth ezloader.sys). the windows 7 just try to searh the wrong path. the drivers(ezload.sys and ezusb.sys) are correct since i can mannually install them and they works fine.
i don't know how to guid system to automatically find the second part of driver, i.e. ezusb.sys. as long as the system find ezusb.sys, it load and works fine.. adding "set path = c:\windows\system32\drivers", which is where the ezusb.sys and inf file is, wound not work..
any suggestions? thank you very much!