RPM fails under Mandrake 9.0

Hello all. I'm trying to install rmp GHC under Mandrake 9.0, but it fails saying that it depends of libreadline.so.4, and this file exists in /lib, symlinked to libreadline.so.4.3. Sorry, but I'm too newbie, I've try to force installation but same error occurs. Thanks. ___________________________________________________ Yahoo! Sorteos Consulta si tu número ha sido premiado en Yahoo! Sorteos http://loteria.yahoo.es