Is it that due to "Web Service Call" option is disabled, you are not able to proceed further?
As you are importing SOAP request file from "Import SOAP" button, might be due to this web service call was disabled.
To use web service call, you need to have WSDL URL. If you have it, click on either Add Service Call button or Manage Services button. After importing WSDL URL, web_service_call function will be created.
When you import soap request from import soap button, soap_request function will be created. For example below:
soap_request("StepName= SOAP Request",
"URL=http://qa-xyz/abc.svc?wsdl",
"SOAPEnvelop="
"YOUR IMPORTED SOAP REQUEST FILE CONTENT",
"SOAPAction=http://tempuri.org/servicename/methodname",
"ResponseParam=response",
"Snapshot=t1315689.inf",
LAST);
Does this helps you.