allow connections to SSL sites without certs

Hi, am new in the web services world so please be patient. 

I'm using the free version of soapUI-3.0.1 for now. I have a server running a dummy ssl with no certificates.

Using a shell

# curl -k server.example.com:443

I obtain a positive response:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <soapenv:Header/>
   <soapenv:Body>
      <PING>hello world</PING>
   </soapenv:Body>
</soapenv:Envelope>

I was playing with requests/responses over http and everyting was working OK.

Now I switched the endpoint to https://server.example.com:443 obtaining the following error

javax.net.ssl.SSLException: Unrecognized SSL message, plain text connection?

I'm stuck here, any advice?