SOAPUI Mock WS SSL

I am trying to mock a Soap WS with SSL, in order to do that first I generated a private key in a keystore using keytool (alias : soapui) then I configured the SSL Settings in SopaUI Preferences:

Enable Mock SSL : enable SSL for Mock Services

Mock Port 

Mock KeyStore : (keystore location)

Mock Password : (keystore password)

Mock Key Password : (private key password)

Mock TrusteStore : (the same as Mock KeyStore)

Mock trustStore Password : (keystore password)

 

Then I try to run the Mock WS and I get the following error:

java.io.IOException: !JsseListener: java.security.UnrecoverableKeyException: Cannot recover key

 

If I remove "enable SSL for Mock Services" from Preference the Mock WS works fine (without SSL).

 

I do not know if I am missing anything, I double checked and password are correct... Maybe the private key alias is wrong but I would not know which alias to use instead...