eac3to - "This audio conversion is not supported"

[HockeyStick]

Everything was working great with eac3to until recently with newer versions. My goal is to downconvert an 5.1 640kbps AC3 file to a 2ch 192kbps one. Everytime eac3to gives me the same error: "This audio conversion is not supported". DTS to 640 AC3 is working great, but WAV to AC3 gives me the same error. I'm using eac3to with EAC3toGUI. With the older version 2.0.50 the WAV conversion works!
Here's the log:

eac3to v2.35
command line: "C:\Documents and Settings\E8400\Bureau\DVD\eac3to235\eac3to.exe" "C:\Documents and Settings\E8400\Bureau\AudioTest\Test640.ac3" "C:\Documents and Settings\E8400\Bureau\AudioTest\Test192.ac3"-192 -down16 -down2
------------------------------------------------------------------------------
AC3, 5.1 channels, 1:35:56, 640kbit/s, 48khz
This audio conversion is not supported.


Anyone with a clue?
Thanks

[Snowknight26]

Stop using the GUI. You need to add a space between "...Test192.ac3" and "-192".

[HockeyStick]

You're right, everything went smoothly without the GUI. The GUI worked by selecting nothing and just write the commands in the last tab...so why using it!

Thanks for the advice.