Hello,
First thing to check : Does your partition appear in disk utility ?
Second thing to check : can you boot into windows through reboot + maintaining "alt" until you see a windows volume on your screen next to the mac volume ?
I've got an associated question. Each time I use vmware to launch my boot camp partition (without actually rebooting), the disk is unmounted from mac OS. When I shut down the VM, the disk mounts back on mac OS. Sadly,it is not anymore in spotlight confidentiality list, thus indexing of this volume starts again. What a pain...