Thank you for replying. In fact I made a mistake. I was well using 3.62 version of PSN DM. So it's not a bug from your program.
But the simple fact that you mention port redirection problem is nice. I'll have a look at it. Do you mind developing this? "it's thrown an exception as the port you've chosen already"
I see the direction, but I lack workable information
EDIT: Just got a flash... Am I answering my own question by saying that I'm using the same port (8080) with both LG5 Tool and your PSN DM?