Hi and welcome to LQ
A couple of things:
please try to use more descriptive titles in future - Help Plz doesn't tell us anything about your problem and people looking to help may just pass you by
secondly, please only create one of each thread. The Rules prohibit cross posting and multiple posting.
OK, on to your problem - Mandriva uses a thing called Urpmi to dal with package management. Go to the
EasyUrpmi website, follow the instructions to set it all up and then type "urpmi amsn" to automatically install the program and to resolve dependencies.