Give it a week then try again (unless she's a really small baby, in which case you may want to just give it a couple days). There's no reason to pull on the mouse after the snake strikes. Some will tighten up when you do that, others will freak out and let go. Nothing to worry about though. Most snakes won't eat for a week or two after being rehomed so you've got plenty of time before you need to worry.

Also, no handling till she's eating well for you is a good rule. It can stress them out and make them less likely to take food at first.