Another: Unable to create directory

I have just installed WordPress on Windows Xp Pro IIS.
I have given the wp-content and subfolders (uploads) all permissions and still i get the following error:
Unable to create directory C:\Inetpub\wwwroot\wordpress/wp-content/uploads.
Is its parent directory writable by the server?

I think it has something to do with the slashes, any tips would be greatly appreciated chmod just won’t fix it.