Have you tried prescenting, or leaving her overnight with the f/t??? Are you warming the mouse first with some warm water (in a ziplock)??

Temp and humidity are very important. If you can't get the second UTH and thermostat quickly try a very low watt light set several inches above the cool side.

Those hides also look a bit large for her, they should be snug to her on all sides, top included, try some smaller ones, and then you could always use those again once she gets bigger.

Have you tried a live mouse??

Also, what kind of substrate is that???