you cant change the fact that he is showing your stats page. You can pull his if you want tho
its the shoutcast server port after the IP such as
126.96.36.199:8000 thats for a default setup on IP address 188.8.131.52
if its bothering you/freaking you out then just make sure you set a good password and restart the server.
Or send him an email asking him why its on his site and ask him to take it off