Reply to Sync won't do direct!

So, Im trying to get the deck A/C sync-button on my VCI-100 to work as a momentary switch, but it doesnt want to. Im suspecting it has to do something with the firmware, but Ill give it a shot and ask you guys. Does anyone know how to fix this? Im running the 3.5.2 DJTT-mapping.

Thanks!

/Kob