SoapUI Test Scripts not running in LoadUI

Thank you for your response Ole,

Please clarify a point for me: I can run my GetPasswordExp test case in SoapUI (which sends a username and password which are stored as global variables in the project), and it returns some XML format data (example below).

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <soapenv:Header/>
   <soapenv:Body>
      <p39:getPasswordExpDaysResponse xmlns:p39=address-removed>
         <getPasswordExpDaysReturn>
            <endTime>2011-02-02T13:59:58.054Z</endTime>
            <error xsi:nil="true"/>
            <recordCount>1</recordCount>
            <startTime>2011-02-02T13:59:52.669Z</startTime>
            <passwordExpDays>85</passwordExpDays>
         </getPasswordExpDaysReturn>
      </p39:getPasswordExpDaysResponse>
   </soapenv:Body>
</soapenv:Envelope>

I assume this is what is meant by a "SOAP Response"? If that is actually an HTML page back, then that may explain a few problems...

To address your questions for me:
I do not believe I have a proxy set up in SoapUI - in SoapUI, I went to File -> Preferences -> Proxy Settings, and every field here is blank. I am able to hit the site URL without turning the proxy on. All that is required is a valid certificate, which I do have to select whenever I first open up the site in my browser (I am mainly using Firefox 3.6.13 and sometimes I.E. 8 ).

In my SSL Settings tab in the Preferences window, I do have a keystore and keystore password set up, and the password is configured correctly (again, the status = OK in the Security Configurations -> Keystores/Certificates tab).

And lastly, yes - the SSL Keystore points to the .pfx file that I have set up as a global Keystore.
I do not, however, specify the username and password with the requests that may need to utilize it... Perhaps that is the issue? Will check into the momentarily.

As it is now, the Test Cases that I have set up in SoapUI run with a green light, and return code that looks like XML format. I try to sync these test cases with my project in LoadUI and run them, but they fail immediately.
Is there somewhere in LoadUI that I have to set up the SSL Keystore and/or username and password property as well?

Again, thank you for taking the time to answer my newbie-questions.