Sometimes you just have to be patient with them. Personally, if it's been a an hour and a half, I would just put her back in her viv and try another day.
If she's shy or a picky eater, try feeding her in the evening or at night. You might even leave her all night the next time. Just put her in a deli cup or tupperware type container (with air holes) and leave her in with the pinky overnight. Leave the container in a dark, quiet place and don't disturb her.
She might also prefer live, unless you're already trying live. If she doesn't want live, you can try putting slices down the pinky's back to help give it more scent. There's lots of different tricks you can try, but don't panic over them yet. I would just wait a few days and try again leaving her overnight with the pinky. It's important to wait at least a few days (3 or so) between offering food. If you offer everyday and she refuses everyday, you are essentially conditioning her to refuse.
Does that help? Feel free to ask anything else if that isn't clear.
