She's got it marked. Here's what you should do:

Need water, baking soda, and nature's miracle.

1) Pour a little water on the area where she is going, and add baking soda to cover the area. Let set for about 2 hours. Then vacuum. The baking soda will act as an absorbant and lift the waste out of the carpet. Repeat about 4 times (or more) depending on the amount in the carpet.

2) Once you get out the "liquids", add natures miracle to the spot and repeat with the baking soda. The enzymes will remove the scents and other marking evidence.

Then watch for her signs of having to go, then take her outside and command "GO POTTY". Do not bring her if until she goes. Continue with this training everytime you see her sniffing around. Be consistant always.

If you can't do this because of work, then crate her. She should not go in her crate until you release her. Then when you take her out, command "GO POTTY".