I would say a couple things.
First off, if this the first feeding attempts you've made with your new baby, you may be better served to start it off with a live prey item (of course keep a close eye on them so as to guard against your snake being injured by the feeder). This can get that first meal down to serve as some reassurance for you, and then you can work on getting it to take F/T prey items.
Second, it sounds like your f/t feeder was in pretty bad shape if its hind section fell off while you were trying to offer it. You might just need to try a new source for frozen feeders and you might find that was your problem.
Lastly, when feeding f/t make sure you get them HOT, not warm, HOT!!!!!! I still forget this rule sometimes mysel and then am amazed at how much of a difference it makes for their feeding responses once I really get the feeder HOT!!!!
Don't get discouraged, as I'm sure you already know, they can go a long time without food before any real issues arise!
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Ike Lightner
2.3 BRB Breeders (Dugo, Sultan, Roxy, Brazita, & Lucille)
1.0 BRB striped holdback (Nando) from Roxxy's litter of 25 on 8/23/10
1.2 100% het hypo BRB (Diego, Rasheena & Liddia)
0.1 Hypo BRB (Ireena)
Total collection of breeders and future breeders
4.6 Brazilian Rainbow Boas - Epicrates Cenchria Cenchria