As usual, once you know the solution it is easy. I always tried it with the emulator, never on the nevo controller itself, and that seemed to do the trick. Probably the emulator does not yet work correctly for IP devices.

Thanks to excellent advice of D.: You are correct. No Widgets or .Nevo plug-ins work in the emulator, IP devices will work but only outside widgets.

It might save you some time.
Tom