I'm migrating my server from NFSv3 to NFSv4,

all my computers are doing ok, but with the sharp netwalker i cannot do it. I receive the next error when I try to mount the directory:
"mount.nfs4: No such device"

The line of the fstab I have is:
XXXXXX:/server /server nfs4 _netdev,auto 0 0

Can anybody help me?