What about gently easing her into it...like let her fall asleep wiht you then move her inot her cot? It may take a little while but it can be done gently and wiht not much fuss. Also let her play in her cot quietly so she isnt scared of it.
If she wakes up during the night just get her back to sleep and then transfer her....is the cot i your room? if not maybe get a matress for her to sleep on?

Good luck xxx