Thanks Neil but i won't write befor i at leaset have done 90% of did u say,
1-I have tried to run the code in Keil complete version and it was working perfectly.
2-I have tried the code of the c program alone on XP,Win98 OS and i've detected the change on comm port due to characteres sent on by keyboard
3-About H/W i checked it many times and with some of my friends so i think it's well.(RS232 cable of 2 Female Terminals - and the MC with its basic connections)
4-I don't know what is a standard terminal emulator ??