heres what u do..
1. Goto folder options, under View->Advance Settings the last option would be "Use Simple File Sharing" .. uncheck this box and apply the changes.
2. Right Click on the folder and select Properties->Security.
3. Goto Advance->Owner and select your account from the list, check the box on the bottom where it says "Replace owner on subcontainers and objects"
4. Apply the changes and hit OK.
5. Now once again right Click on the folder and select Properties->Security.
Under "Group or usernames" select your Account.
Under "Permission for ____" check all the boxes under Allow.
6. Apply the changes and hit OK.
that should do it