undeletable folder

I am running Win 2003 on 2 servers in a high school situation with WIn XP SP2 clients. I have 4 student users i cannot delete because their home directories each have a folder that i cannot remove. It is buried about 6 subfolders down in their MySettings folder. I have made sure the path name is not too long, i have successfully written a text file into the folder and subsequently deleted it. I cannot rename the folder itself nor move it. Anyone seen this before and can help out? Thanks