Error installing lame from rpm

[Steve]

Below is the output when trying to install lame.  What am I doing wrong?

[bigdaddy@d207-81-8-112 bigdaddy]$ ls
Artwork  Desktop  evolution  lame-3.96-1.1.fc2.fr.i386.rpm
[bigdaddy@d207-81-8-112 bigdaddy]$ rpm -i lame-3.96-1.1.fc2.fr.i386.rpm
warning: lame-3.96-1.1.fc2.fr.i386.rpm: V3 DSA signature: NOKEY, key ID
e42d547b 
error: can't create transaction lock