[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