Hi guys, I want to use a desktop PC with my tester having serial data connectivity. When I use laptop win 7 64 bit, it's keyboard works fine and tester respond upon commands. But when I install same tera term app on desktop, keyboard don't write any thing there but working fine in window at same time. I enable echo from setting then it showing whatever I was writing but tester still didn't respond....Detail cable is fine because it is working with laptop. I think either there is some setting problem or hardware interfacing of PC itself...Need some expert advise.