Bulbosa Guatemala - It probaly needs more humidity and moisture. I have one in my greenhouse that gets doused by the sprinkler system every three days but the humidiity is always over 50%.
I agree with the others about 'seasoning' your driftwood but I have rarely had an airplant 'root' to something. You will probably have to attach your plants to the driftwood but that could make watering easier if you use something like orchid butterfly clips. Un-attach, soak, re-attach.
My daughter found an old picture frame, strung wire in a grid and attached all her airplants to the wire grid. Then hung the entire contraption over her kitchen sink in front of the window. Its very cute and the airplants seem very happy.
Daisy