nfs mount problem

[Brian Wootton]

I can't for the life me get an nfs mount to work,
this is the entry I've put in /etc/exports:

/pub/brian      meg(ro,insecure,all_squash,sync,no_subtree_check)

which at least generates no errors from the server nfs daemon, but
all I get from the mount command on the client is 'access denied by
server'. mutter, mutter.
I've tried ip addresses, I've tried a multitude of differnet options(in-
cluding none), makes no difference, still get access denied by server
on the client machine.
  I've read 'man exports' until my eyes water. I found some useful
howtos on google, but still 'access denied by server'.
  If any-one has a magic entry for me to try I'd be glad to try it, or any
helpful hints.
brian