SQ1 - Midi Clock NOT received from Cubase 6

[mercuryfall]

Hello,
I am trying without success to have the SQ-1 recognize a midi-clock signal from Cubase 6 using Windows 7. I correctly routed the clock to the SQ-1 in the synchronization windows. However, it doen't start nor stop with Cubase sequencer, and still uses its internal clock. Other midi devices slaved to Cubase Midi Clock in the same project work fine (i.e start and stop with Cubase transport and at the right tempo).
Thank you very much in advance for your help!