I really need some help : ( Dear all ,I really need some help ,I don't know why my pc can't open the chat-box on Italki .I asked few of my friend to help me solve the problem ,but it was all failed..help...Thank you very much ... 有没有同仁也遇到这个问题啊，我电脑系统是Wind 7 的。。 谢谢了，求解！！