Qt Eclipse Integration and Custom Widget PlugIn

Question

Does anyone know the correct procedure to compile a Custom Widget to be used under Eclipse Integration Plugin under Windows with MinGW?

I tried the following steps, but I cannot see the widget in Widget Bar:

1. Installed Qt 4.6.1 for Win32 (with MinGW)
2. Installed Eclipse Helios 32bit (tried with Galileo too)
3. Installed Qt Eclipse Integrator 1.6.1
4. Reconfigured Qt for Integration: " configure -release -qtnamespace QtCppIntegration"
5. Compiled plugin in release using Eclipse (tried with Creator too)
6. Copied "dll" file e "a" file in folder "C:\eclipse\plugins\com.trolltech.qtcppdesignerplugins.win32.x86_1.6.1"
7. Launched "eclipse -clean" to reset plugins

Naturally the Widget works well under Qt Designer and I can use it there without any kind of problem.

Thank you Myzhar