I used to have a REALLY tough time getting my daughter to sleep in her own bed, but I found that setting a routine (brushing her teeth, bedtime story, a lullaby, whatever) that takes a while (our bedtime routine takes about a half hour now, which is a long time to a kid) and sticking to it helped ALOT. At first there was lots of screaming and tantrums but we stuck to our guns and now she goes to bed without arguement (most of the time). I'd suggest trying that, kids crave routine, and once she figures out that this is a battle she isn't going to win, you'll be happy you stuck it out - I sure am
