if you are using an older version of eclipse , there were a bug in swt compiled only for win32.

I’m running current milestone (Indigo) so it’s definitely not old :)

By my side i am using eclipse helios 64 on windows 7, and the extension work well.

I dont know if the set of plug-in deliver by the extension are compatible with the cdt,pde core from the developer build eclipse indigo ?

I having the same config:
eclipse indigo on window 7 64bits
and the same issue:
qt integration does not report any error but still it doesn’t work

Has anyone managed to find a solution or explanation?

I have same issue.

I tested exact same version of the Eclipse Indigo CDT release in 64bit and 32bits. Under 32bits the QT integration works, under the 64bits it does not work. Both under Windows 7 64bits