Software :: Debian Lenny Nfs RPC Error ?

I have a server running debian lenny on which im trying to set up nfs exports.

My problem is that every time I try to mount the nfs share from a client machine (another debian lenny box) I get

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The line in /etc/exports is:

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exportfs -v gives:

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I have searched everywhere I can think of to try and find a solution to this problem but with no luck.

All the posts I have found talk about ensuring that portmap is installed, which it is, and starting the services in the right order (starting portmap first, then nfs server), which I have done.

I don't fully understand portmap, all I understand is that it maps rpc ports to unix ports. How does a daemon register with portmap? Should it just do it automatically?

On the server, the output of rpcinfo -p is:

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Is there anything else that could be configured incorectly to stop the nfs server from registering with portmap?