BeagleboardxM Rev[C] booting over NFS.

i am trying to share filesystemover 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
uptill now only success so far is it takes kernel on TFTP from my
host .
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;
/
************************************************************************************************/
# boot
screenshot
U-Boot SPL 2011.12 (Jan 23 2012 - 18:42:29)
Texas Instruments Revision detection unimplemented
OMAP SD/MMC: 0
timed out in wait_for_bb: I2C_STAT=1000
reading u-boot.img
reading u-boot.img

U-Boot 2011.12 (Jan 23 2012 - 18:42:29)

OMAP3630/3730-GP ES1.2, CPU-OPP2, L3-165MHz, Max CPU Clock 1 Ghz
OMAP3 Beagle board + LPDDR/NAND
I2C: ready
DRAM: 512 MiB
WARNING: Caches not enabled
NAND: 0 MiB
MMC: OMAP SD/MMC: 0
*** Warning - readenv() failed, using default environment

In: serial
Out: serial
Err: serial
Beagle xM Rev C
No EEPROM on expansion board
Die ID #08aa00029ff80000016830101600800a
Net: Net Initialization Skipped
No ethernet found.
Hit any key to stop autoboot: 0
The user button is currently NOT pressed.
SD/MMC found on device 0
reading uEnv.txt

570 bytes read
Loaded environment from uEnv.txt
Importing environment from mmc ...
Running uenvcmd ...
(Re)start USB...
USB: Register 1313 NbrPorts 3
USB EHCI 1.00
scanning bus for devices... 3 USB Device(s) found
       scanning bus for storage devices... 0 Storage Device(s) found
       scanning bus for ethernet devices... 1 Ethernet Device(s) found
Waiting for Ethernet connection... done.
Using sms0 device
TFTP from server 192.168.1.10; our IP address is 192.168.1.4
Filename 'uImage'.
Load address: 0x80200000
Loading: