BeagleboardxM Rev[C] booting over NFS.linux-3.2.0

hello All !

i am trying to boot my kernel-3.2.0 with NFS, but after a lot of
efforts i m not being able to;
Folowing are the details, all i have,please help me why i cant have
NFS in my beagleboardxM RevC.

host side: Ubuntu10.10
     NFS: nfs-kernel-server
     DHCP: dhcp3-server
     PORTMAP
    /etc/exports/:/tftpboot *(rw,sync,no_root_squash)
    /etc/dhcp3/dhcpd.conf: ddns-update-style none;
         option domain-name-servers 61.0.0.5,61.1.96.69,61.1.96.71
         default-lease-time 600;
         max-lease-time 7200;
        subnet 192.168.1.0 netmask 255.255.255.0 {
        option routers 192.168.1.10;
        option subnet-mask 255.255.255.0;
        }
        host anas {
            hardware ethernet 6c:f0:49:f3:b2:af;
            fixed-address 192.168.1.10;
            option host-name "anas";
            next-server 192.168.1.4;
            #filename "/tftpboot/uImage";
          }

        authoritative;
        log-facility local7;