SoapFault: [HTTP] Unable to parse URL...

[doctor_shim]

Hello everyone. I've been working on a client for my own web service. For some damn reason every time I call a method (any method) in my service, I get this error:
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[b]Fatal error:[/b] Uncaught SoapFault exception: [HTTP] Unable to parse URL in /path/to/my/client/script.php:12 Stack trace: #0 [internal function]: SoapClient->__doRequest('<?xml version="...', '', 'urn:ScoreboardA...', 1, 0) #1 [internal function]: SoapClient->__call('doSomethingExceptional', Array) #2 /path/to/my/client/script.php(12): SoapClient->doSomethingExceptional('my argument') #3 {main} thrown in [b]/path/to/my/client/script.php[/b] on line [b]12[/b]
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I wrote the WSDL file by hand, however I compared it to several tutorials, existing WSDL files (even Google's), and it looks fine. I'll attach it if someone thinks there might be a syntax error in it.

All my files are included correctly, and I am calling a service operation that exists.

Would anyone more experienced in the realm of PHP web services know what's happening?