did you format that partition? if you haven't you need to for the os to recognize, but if you have formatted it already than i am not sure what the deal is. If all else fails just go and buy partition magic, i personally never used it but i have heard nothing but good things about it.
That was quick. Yes they are formatted. As ususal, after I posted this, I ran across something about Win XP pro storing partition table info in special location and not in the partition table. I've been looking for a while, just didn't think to use 'partition table' in my searches.
I Have one partition that is dynamic and that could be forcing WinXP to store all the partition table info outside the normal area. I still hunting, but I might just trying partitioning the drive outside of windows and see if that does the trick.