streaming screen errror

[csmith3texscan]

WIN7 64 bit
Intel i3-2100
VLC 2.1.1

Trying to stream desktop to file:

:sout=#transcode{vcodec=h264,vb=2000,acodec=mpga,ab=128,channels=2,samplerate=44100}:file{dst=C:\\testfile3.ts,no-overwrite} :sout-all :sout-keep

I get an error:

Your input can't be opened:
VLC is unable to open the MRL 'screen://'. Check the log for details.

Where is the log??

This works fine on an old XP machine with the same settings, but not on this Win7 machine.
Any ideas?

[Jean-Baptiste Kempf]

To help you, we need messages, to completely understand what your problems is.
To fix this, please be sure before you start the playback to:

1. Open: Tools -> Messages.
2. Set Verbosity to 2
3. Start playback to reproduce your issue
4. Save text in a file or copy into clipboard
5. Then paste the full resulting log here between [​code]and[​/code] (or use Pastebin.com if it's too long)

Also don't forget to name your Operating System and provide the VLC media player version.