Not able use the ipaddress and netmask properties from ovf using ovftool

OVF Command option:

ovftool.exe "--acceptAllEulas=true" "--name=Robo_Naren_vApp_Temp" "--datastore=fiddleback-esx2:storage1" "-dm=thin" "--network=VM-Network" "C:/appliance-main-image-8.0.0.3.0.ova" "--prop:hostname=naren.am.com" "--prop:ip=10.0.0.xx9" "--prop:netmask=255.255.252.0" "--prop:gateway=x1.3x.2xx.1" "--powerOn" "vi://root:xxxxx@1x.xx.2xx.5x/"

When i try to execute the above command i'm getting the below error.

Error:

Error: Unexpected option: --prop:ip=10.0.0.xx9

Completed with errors

OVF properties

Here's is my ovf content for the properties

      <Property ovf:key="ip" ovf:required="true" ovf:type="string" ovf:userConfigurable="true" vmw:qualifiers="Ip">

        <Label>2. IP Address</Label>

      </Property>

      <Property ovf:key="netmask" ovf:required="true" ovf:type="string" ovf:userConfigurable="true" vmw:qualifiers="Ip">

        <Label>3. Subnet Mask</Label>

      </Property>

      <Property ovf:key="gateway" ovf:required="true" ovf:type="string" ovf:userConfigurable="true" vmw:qualifiers="Ip">

        <Label>4. Default Gateway</Label>

      </Property>

Using  "vSphere Client version 5.1.0"

Can anyone help me in resolving this problem ?