Problem with proxy in SOAP::WSDL

I have my service running on one of my local machine
When I hit the url from browser every thing work properly
But when I use following command it gives error.
I am not sure what to give for the proxy.How to configure proxy .When I
dont give proxy in that case it also give error.

# My code is
my $soap=SOAP::WSDL->new(wsdl =>
'http://192.168.9.181/helloworld/service1.asmx?wsdl');
$soap->proxy('http://192.168.9.181/helloworld/service1.asmx');
$soap->wsdlinit;
my $result = $soap->call('HelloWorld');


# Error message is
Service description
'http://192.168.9.181/helloworld/service1.asmx?wsdl' can't be loaded:
501 Protocol scheme '' is not supported

TIA
Niraj

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