@Vangeli: it is emu problem (this thread) or connection problems? I mean, Studio works?
Again: to make all futures working correctly via serial rs232 from/to Samsung and PC in emu 8.3 you must set sharing mode to NONE. ALL FUTURES includes tranfer settings too!
When you set any CS mode, emu 8.3 acquires priority to com port and if you want serial port for any other application disable cs (NONE) in emu menu.
If you want to check established connection and cable try with hyperterminal turning on sammy from back switch... you may get log on PC screen.