I can't get grip of the reverb

I’ve changed my VST’s from Halion to Garitan in a current Dorico project. All the output’s in the Aria player goes to a different channel.
I’ve set the Send to the Reverb Channel and decrease the send db. There is nothing happen.

In an other Dorico project it works normal. What can be wrong?

After saving, close and restart Dorico I’ve loaded the project. All the sends where empty (instead of the previous post-attachement) , only the values where identical to the state when I save the project. Adding the FX Reverb bus again and it works now.