Try and tire her out a bit before bedtime, see if that helps. Do you have a lamp or anything on in the kitchen as that can often help too. Did the place you got her from give you a blanket or teddy with hers mums scent on it? Hot water bottles (only warm water though) are supposed to be good sometimes as it gives them the feeling of her mum being there.

Saying that i may not be the best person to listen too, as we ended up giving up with our 8 week old lab after trying everything, so she now sleeps at the bottom of the bed in her basket.