WTFs sleep all day stuck to the glass - in time it may pick the glass behind the corkbark, give it some time to acclimate. To help decrease him jumping into the glass, be sure there is background on 3 sides of the tank. One he then can't see through it - which he has no concept of glass, if he can see through it, he can go through it in his mind. The background also helps decrease stress by giving them a sense of security. As far as his activity, he is going to sleep all day in the same spot without moving - that is a GOOD sign. He will come down at night, hunt for crix, soak in the water bowl - where they often pee and poop at while they're there and maybe hand out a bit before returning to their sleeping spot. The longer you have him, the better you prove to him that you will not hurt him, the more comfortable he will be around you. This sometimes takes months but it well worth it in the end. Do not hold him, do not disturb him when he is sleeping, do not turn lights on in the room he is in at night to look at him, feed him and keep his water clean and he will acclimate well to captivity and have a long healthy life. Hope this helps.
Becki
-----
Happy Frogging!!! 

~Becki~