[newbie] problem installing Mandrake 7.1

[Wienand Drenth]

I tried to install Mandrake 7.1, but encountered a problem.
Everything went well untill the actual package installation. Error was
something like:
   Fileheader missing

This occurred after you had to specify what cd's you had.
After this the installation couldn't be continued.

Can anyone help?

Wienand