Sue,
Nice images, but I'm not happy with your lighting, nor with your choices of focal lengths.
Chris has already commented on the lighting in the first image, and his comments are spot on, but they also, I think, apply to most of the other images.
Look, for instance, at the last image. You have a light to camera right which is throwing light onto the side of your
model's face, her lh shoulder, and both of her thighs. But much of her torso is in shadow; did you not have any light towards camera left, but basically adjacent to where you were shooting from? I think that a light in about that sort of location, may have helped. Probably need about .7 of a stop between these two lights, and expose for the primary light source.
The penultimate images suffers similarly (IMHO) but not quite to the same extent.
Those two images were shot using 50mm and 60mm respectively. On the 5D2, I would think that something in the realm of 105mm - 135mm would have been more suitable for these images.