I'm trying to use Ableton Live 4 in rewire with Cubase SX 2. Audio works well but when I use MIDI I don't find the outputs in Cubase so I can't hear anything of what Live plays. Why so? Have I got a problem with my pc or is this the way Live works in rewire?

It's the way Live works.None of your VST plugs will be loaded into Live when it's a ReWire slave.
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Thanks, I know about the VST plugins but the problem is that it seems to me that it's not possible to use midi when Live is in rewire slave with Cubase.
When i use Reason in slave with cubase I can choose the output from the midi channel in Cubase and select the device, and I can control that device (Dr. Rex for example) directly from cubase receiving the sound from Reason.
I can't do the same with Live... I'm not able to use the Impulse or the Simpler from Live and control and record them on Cubase becase Cubase doesn't show to me the midi output for Live. So... Have i got a problem with my sistem or is it impossible to use the midi devices of Live when it's used in rewire slave? If so what's the meaning of use Live in rewire with Cubase?

The audio channels work perfectly and Cubase receive the audio signal on the bus selected so I can include the audio track making a final Mixdown on Cubase, but what about the midi?