Fedora Servers :: NFS Drive - Mount System Call Failed

These are the settings on my server, which has a static ip:
Code:
[tim@computim ~]$ cat /etc/exports
/media/cavern 192.168.1.*(rw,sync)

Code:
[tim@computim ~]$ cat /etc/hosts.deny
portmap:ALL
mountd:ALL
rquotad:ALL
statd:ALL
lockd:ALL

Code:
[tim@computim ~]$ cat /etc/hosts.allow
portmap: 192.168.1.2/100
lockd: 192.168.1.2/100
rquotad: 192.168.1.2/100
mountd: 192.168.1.2/100
statd: 192.168.1.2/100

When I try to mount the disk from my client machine I get the error:
Code:
[tim@localhost ~]$ sudo mount -t nfs 192.168.1.10:/media/cavern /media/cavern
mount.nfs mount system call failed

Thinking the problem might be due to iptables I tried the following command as recommended by a book I found on google:
Code:
sudo iptables -A INPUT -i wlan0 -f -j ACCEPT
didn't help so tried disabling the firewall - still getting the error
Both machines are running FC11 - should i be using nfs4?