problems with soapUI Eclipse Plug-in 3.6.1

I have been unable to get the soapUI Eclipse Plug-in 3.6.1 to work with Eclipse 3.6.2 (Helios SR2) on Windows XP Pro SP3 w/Sun Java 1.6.0_24-b07.

Installation from http://www.soapui.org/eclipse/update and configuration seem to work, but the following are show-stoppers:

1. after creating a Java project in Project Explorer and adding the soapUI Nature to the project from Package Explorer, "Add WSDL" to SoapUI Web Services fails with:
"com.eviware.soapui.support.SoapUIException: Error importing wsdl"
after entering the following:
WSDL Location: https://localhost:6081/ritransport/RITr ... rvice?wsdl
[checked] Create sample requests for all operations?
[checked] Creates a TestSuite for the imported WSDL

2. it is not possible to import an existing working soapUI 3.6.1 project from Project Explorer

3. in Project Explorer attempting to import a working soapUI 3.6.1 Test Suite into SoapUI Web Services via soapUI | Import Test Suite fails with:
"Missing SOAP Operation in Project"

I tried this with the soapUI Eclipse Plug-in 3.5.0 and 1. works but 2. and 3. do not, so it would appear soapUI Eclipse Plug-in 3.6.1 is not ready for prime-time.

Does this also mean that soapUI projects and test suites are not interoperable w/soapUI Eclipse Plug-in?

Thanks for any pointers.