Connection problem for SHOUTcast 2 server

I recently installed a SHOUTcast 2 server in my computer. My friend learned about this and he wanted to stream on it. However, he cannot connect and it always says “Connection rejected. Bad icy header string [icy-name:].” I don’t know why it happens every time he tries to connect but I had configured my SHOUTcast properly because I followed the directions in the manual that icy-name should be used if the host/user does not give one.
I hope you could help me with my problem. Thank you very much.
