about skype

i know some information here about the skype, a kind of software serving for chating. then i check it on baidu.com. with a little knowledge i download it, and soon become a resgistered user. but in the process of registering, it fail because the name has already been used. so i have to change to another one. but i still have no idea about how to chat with foreigners. then i try to find some one with the name what i want at first. when facing the result, i find there are so many chinese there . of course , some foreigners are there. so i choose an american sending a message and wonder if he/she could get the message. but no answers. then another one, still no answers . and the third one , no answers . so i give it up. i don't know whether there is something wrong with the software here or they didn't catch the regards or maybe they were too busy or popular! maybe other reason else! whatever i don't know and don't care. i will try again tomorrow!