Enable BIND cache server to resolve chinese domain name?

Hi, Some of our customer complaint they could not visit back to their web site, which use chinese domain name. I google the net and found some one recommend to use public-root.com servers in hint file. I found domain name like xn--8pru44h.xn--55qx5d could not be resolved either. Our cache server runs BIND9.3.1 with root server list from rs.internic.net. Do I need to modify our cache server configuration to enable it? regards Joe __________________________________ Meet your soulmate! Yahoo! Asia presents Meetic - where millions of singles gather http://asia.yahoo.com/meetic