[wlug] Fedora 2 and rpm denial

I just tried installing mplayer but got denied with this message: root(a)localhost john]# rpm -Uvh mplayer-1.0-0.10.pre4.1.fc2.fr.i386.rpm error: mplayer-1.0-0.10.pre4.1.fc2.fr.i386.rpm: V3 DSA signature: BAD, key ID e42d547b error: mplayer-1.0-0.10.pre4.1.fc2.fr.i386.rpm cannot be installed

[root(a)localhost john]#

Anyone able to help please. :( John.