Problem lead-through in the right ribbon

wverwimp

When i click at the lead-through in the right ribbon, it is saying it's not supported. Otherwise when i go to the jog menu i can enable lead-throug. And it is working. So what is going wrong. Before the lead-througt in the ribbon was working, i've only made a new program so every program module was erased and the standard was set back again. After restarting this problem occurred. A restore to an older version seems not  to be working to reactivated the lead through. Somebody any idea what the problem gives. The lead-through with asi buttons also works.