J.H.
Yep, I had the same problem....long story short since you've had lots of posts and good advice....stop and give up for awhile. We too tried everything and absolutely NOTHING motivated her. Dr. said to stop and give it up for a month and then bring it up again because she wasn't ready and nothing you will do will make her ready. So, we stopped. We brought it up again a month or two later and she's now 3 1/2 and totally trained. The pooping came afterwards and we didn't have to do anything at all!!!! She did it all herself, because now SHE was ready. Good Luck!