For last two days I am getting libcurl errors on my proxies whenever i browse through it..also, its terribly slow.. i am getting this msg

The requested resource could not be loaded. libcurl returned the error:
Couldn't resolve host ''
I do have curl(7.19.5) and php(5.2.9) enabled..please help me..

Iis this some prob with my host or my script(Glype 1.1)??