benero at gmail dot com (2011-05-12 23:57:46)

If you use https, SOAP modules need to configure with openssl, otherwise will be catch a error like:
SOAP-ERROR: Parsing WSDL: Couldn't load from url

suchasplus at gmail dot com (2010-05-24 20:34:05)

Typically, on microsoft windows(sometimes linux), we got "I/O warning : failed to load external entity" and "Fatal error: Uncaught SoapFault exception: [WSDL] SOAP-ERROR: Parsing WSDL: Couldn't load from somewhere".
only xml lib is not enough, php-soap also need cURL, and openssl if you wants connect to https