Make sure you have enabled Tricks of the Trade to be shared -- this is in addition to setting it on your hotbar.

Suppose you want to use it as Weaver...

1. Switch to Weaver
2. Open up the abilities and traits menu (P)
3. Click on the Alchemy icon and those skills will be displayed on the right side of the window
4. Check the box next to Tricks of the Trade
5. It will appear at the bottom of the window now that it is enabled

Now you should be able to use it as Weaver.