Farmboy-
Those shrooms I sent you haven't attached yet?!?! I just put the ones you sent me in the tank (2 free floaters), and they've already attached. Not in an ideal place, but they are attached.
You might want to try rubberbanding them to a small piece of LR for a week. You can also try using a small tupperware with small holes cut in all the sides. Fill the tupperware with rubble or substrate, and put the shrooms in there. All 3 of these methods have worked for me.