I've read the thread about "Bringing the WSDL Editor in the Debugger."
I've a similar problem but not the same. I don't have version problems.
I used WTP 3.1M4 as the target platform. I downloaded the source code from
HEAD. I tried to launch the target platform from my development platform
(i.e. Plug In). I got an error. Later I got an XML editor instead of
the WSDL editor. Here are the screenshots: