A few days is not long enough for her to understand. I havnt found any of mine have taken longer than a few weeks, but have known dogs take months before they are completely clean day and night without any accidents.
If you take her outside, and most importantly wait with her until she performs, as soon as she wakes up, after food, and every hour in between, when she does what you ask, give her plenty of praise. Even if you catch her in the act, take her out so she gets the message in the house is not the place to do it.