So sorry you are still having problems with pooping outside the box. Is it the same cat as before that was not using the litter box?
What have you tried since the last time?
Are you still feeding canned food? They need it more than one time a day as cats do not do well going for long periods without food.
Is she constipated and maybe associating the box with painful bowel movements? Canned food often would help this and maybe ask the vet if adding a little plain canned pumpkin.
Is the litter box scooped a couple of times a day? Is the litter box washed clean and new litter on a regular basis?
How many litter boxes do you have and are they spread out? It is recommended that you need one per cat plus one. You would need 4 boxes.
Have you tried the suggestions listed in the sticky above? These are from a very experienced person. http://www.thecatsite.com/forums/sho...threadid=19767
Let us know what you have done since Feb and if anything has changed. That way maybe everyone can help you with more suggestions to try.
Hang in there!