by PietjeNL » Sun Jun 17, 2012 9:51 pm
Problem is with the driver, not with the source.
Basically if u download the driver from ftdi site it has some problems now and then.
U need to remove all ftdi drivers with the program ftdi has on there site, and then install the source again with the drivers that come with it.
Or just use /comport=com<number>
Had the same problem here, fixed it by removing all drivers like above.