It sounds to me like you're expecting your daughter to sort out her urges/sensations in a pretty short time. Even my grandson, nearly up to the age of 5, needed a good 10-20 minutes to accomplish pooping, and he appreciated a grownup sitting nearby reading him a book during the tedious process. How about just relaxing with her (relaxation is good – it allows body functions to proceed normally), and reading or having a fun conversation?
There are also parents who keep a potty seat in the child's main play area during early training, or even watch potty videos while the child is sitting.
Another thing that helped with my grandson's early days was to present a "play" or "potty party" with his stuffed toys while he sat. I'd line them up at a pretend potty (a can or tub) and they would take turns sitting, grunting a bit, and producing a little lump of playdoh mixed to a nice brown. All would congratulate, and the next toy took a turn.
It can be tricky to get the right amount of focus on the process. Too much can actually freeze the attempt by taking the child's attention away from the whole process. Too little can remove the sense that the child is accomplishing something of value, and helping her notice useful sensations while her body is doing its thing.
Here's a wonderful, informative website you might find helpful. It gives a few variations on"readiness" checklists, plus tips on various training strategies, the best ages to start them, and the advantages and disadvantages of each approach: http://www.parentingscience.com/toilet-training-readiness...