Cannot retrieve some URL

Hello,

I don't know why I couldn't reach some normal URLs? For example:
http://www.freeservers.com
http://www.japanesegirls.com (sexual URL, just as an example)
I also cannot reach http://squid.nlanr.net/Doc/Users-Guide/
All of these URLs are very normal, there is no special character in them.
Can you tell me how to resolve it?

Thanks a lot!
Xue Junchao
------------------------------------------------------------------
System Developer & Administrator
Tianjin Scientific & Technical Network Center
URL: http://www.tjst.net http://profxjc.freeservers.com
E-mail: profxjc@tjlink.tisti.ac.cn
BP: 1921312267
TEL: 86-22-23519150
FAX: 86-22-23519296
Addr: No.22, Wu Jiayao Street, Hexi District in Tianjin, China
ZIP: 300074
Received on Sun Feb 20 2000 - 04:40:30 MST