[newbie] Need Help: Makedrake 7.1 - packageFile: missing header ?(error message)?

[Steven Wishart]

 Hi All,
   
   I am trying to install Mandrake 7.1 , but when I try install
   Mandrake 7.1, as soon as I try install any packages I get
   the following error
   
   packageFile:  missing header
   
  Is there a corrupt package I can unselect to get past this one ?
   
   Thanks
   
   Steven