It will probably just take a while for her to adjust to this...think about how exciting this is to her, to be able to get up and move about freely (and without eyes constantly watching her, lol). I personally never liked the idea of closing the door entirely...it seems way too 'cut off' and I don't know, would think it would be more intimidating for them. We always did the gate at their door, which worked for us. Basically I think it will just take some time...this too shall pass, lol...
In regards to the duct tape...skip the duct tape and just use one piece footed pj's put on BACKWARDS...so she can't unzip it, lol...works wonders. ;o) Good luck!
EDITED! ****for M****
Not sure if you will see this M, but I must say I don't see anyone being condescending towards your opinions on potty training on any of the threads pertaining to this...however, you are quick to jump in telling others asking for everyones advice, not to follow some peoples advice that you in particular don't agree with. Just because a child is capable of taking off their velcro tabbed diapper, does not mean they are telling you they don't like to sit in a dirty diaper (as if those of us that haven't potty trained by then make them sit in dirty diapers??) or that they are even ready for potty training. Often times toddlers like to simply undress...and that includes the diaper. She didn't say she strips out of her dirty diaper, she said she undresses and then throughout the night ends up having messy accidents (which even with a child that is potty trained, they often are not night trained, so this would still be an issue). As far as putting a potty in her room? I don't know about your two year old, lol, but mine even if she somehow did manage to get up and use it on time...would then probably proceed to spill or play in it, lol.
I'm sorry, but not all children are the same and I've definitely gotten the impression that you almost 'look down upon' some of us other moms with differing potty opinions. Let me assure you, even if a child doesn't train until three...they can still manage to grow up healthy and happy with loving, devoted, non lazy parents. In the overall realm of parenting, it's just simply not a big deal.