ShardAce - setting Channel for Soulstone message

[AlterSchlapfen]

How do I set the channel for the Soulstone message?
I play with the German game version an we have /p for joining the group channel and /ra for joining the Raid channel.
Now if I enter: /sa setchannel soulstone /p or /sa setchannel soulstone /ra, I do not get a message when I soulstone someone, neighter in the group channel nor in the Raid channel.
What is the correct way to set the channel for the Soulstone message?