resized 2003 server c partition cannot see second half of drive now

i resized my c drive and it booted great and came up to windows 2003 server, but i cannot see the second half of the drive. i had formatted it also and it was named both are showing as not hidden, disk manager does not come up in this so i cnanot use it to work with it and when i tried diskpart command line the shell just hung there with no prompt to type.
i need suggestions on how to make visiablethe second half of my drive.