Yes, it is.
I've also tried GSAK and it give me a similar message that says "Can't INIT COMM 4" or COMM 3 if that is the case.
I've done everything the help sections from both programs suggest, which really isn't very much, and still no luck. The green light comes on for the serial to USB adapter meaning it is working but no data is getting transfered through the cable.
Should there be anything on the screen of my etrex indicating it is connected? For instance, when I plug my cellphone into my computer, the screen has an icon letting me know it is ready for data transfer. I'm trying to determine if it is the etrex, the cable, the adapter, or the computer causing the problems.
I have the exact same problem with my Legend. GSAK doesn't work at all and EasyGPS tells me the same thing as yours but if I look at my display it says "download complete" at the bottom, but there is nothing there. Go figure.
Mark