UI Path - soap request - throws Object reference not set to an instance error

Am trying to consume a WSDL.

it works fine in soapui.

Able to open it in Chrome/Browsers.

When i try to use in soap requets activity of ui path - it fails.

tried with basic auth as well, no use. But atleast it should load, post which for invoking, it should ask auth. Here, it is not even loading the wsdl and operations.

Please help.