can't mount nfs

I want to do this on the the server, 192.168.2.1: mount 192.168.2.2:/usr/local /mnt but I get this: mount: RPC: Program not registered does /usr/local have to be in /etc/exports on every client? It works fine via yast2 but it seems a long way around just to get a few files from a client. Cheers, Steve.