Mimetism 15.2 Direct Level audio

Hi,

I have a Mimetism 15.2 (great amp). I want to use one input to use for my home theatre system, so that I have only one pair of front speaker in my room.

I read the online manual (see http://www.mimetism.com/ARCHIVES/hold.pdf/15.2-manual-gb.pdf page 13) to put one of the line (line 4 : AUX by default) in DIRECT mode using those instructions. When I press the L button and press it for 5 seconds or more, it only displays the level meter and never goes into DIRECT mode. I changed the battery in the remote, and every other controls are just working fine.

Any idea what may be causing this problem?

Thanks