Soap Client failed to open stream

HI

Iam working with xampp on my windows machine and with the help of
xampp i want to connect to exposed wsdl file of Hi5. following are the
steps that i have done

I put the php_soap.dll into the extension folder of PHP
uncommented the line ;extension =php_soap.dll in php.ini

but when iam run test.php it is showing following error


Warning: SoapClient::SoapClient(http://api.hi5.com/hi5.wsdl)
[function.SoapClient-SoapClient]: failed to open stream: A connection
attempt failed because the connected party did not properly respond
after a period of time, or established connection failed because
connected host has failed to respond. in C:\project -OKI\xampp-
win32-1.6.4\xampp\htdocs\hi5\test.php on line 3

Warning: SoapClient::SoapClient() [function.SoapClient-SoapClient]: I/
O warning : failed to load external entity "http://api.hi5.com/
hi5.wsdl" in C:\project -OKI\xampp-win32-1.6.4\xampp\htdocs
\hi5\test.php on line 3

Fatal error: Uncaught SoapFault exception: [WSDL] SOAP-ERROR: Parsing
WSDL: Couldn't load from 'http://api.hi5.com/hi5.wsdl' in C:\project -
OKI\xampp-win32-1.6.4\xampp\htdocs\hi5\test.php:3 Stack trace: #0 C:
\project -OKI\xampp-win32-1.6.4\xampp\htdocs\hi5\test.php(3):
SoapClient->SoapClient('http://api.hi5....') #1 {main} thrown in C:
\project -OKI\xampp-win32-1.6.4\xampp\htdocs\hi5\test.php on line
3.....


Is anybody has face the same problem .