I found that c1scy was not running due to a daq initialization error.
I couldn't figure out how to fix it, so I am leaving it to Joe.
Here is the error messages in the dmesg on c1iscey
[ 39.429002] c1scy: Invalid num daq chans = 0
[ 39.429002] c1scy: DAQ init failed -- exiting
Before I found this fact, I rebooted c1iscey in order to recover the synchronization with fb.
The synchronization had been lost probably because I shutdowned the daqd on fb.