SeeSaw: no function named yv12lutxy

[danube100]

Hey Guys,
I am new to dis ripping and i am trying to use seesaw but i get dis error....dont know why...could not find a solution....pla help me out.....

http://i46.tinypic.com/sd0ok2.png

my script.....
Import("C:\Program Files (x86)\AviSynth 2.5\plugins\SeeSaw.avs")
DGDecode_mpeg2source("C:\Users\Arjun\New folder\VTS_01_1.d2v", cpu=4, info=3)
ColorMatrix(hints=true, threads=0)
#deinterlace
crop( 2, 72, -4, -66)

LanczosResize(1280,544) # Lanczos (Sharp)
a =last
b=a.DeGrainMedian(limitY=4, limitUV=6, mode=3, interlaced=false, norow=false)
SeeSaw(a,b, NRlimit=6, NRlimit2=7, Sstr=1.5, Slimit=5, Spower=5, Sdamplo=6, Szp=16)


plz provide me a solution...

[Archimedes]

yv12lutxy is part of the older MaskTools.

LoadPlugin("plugins\MaskTools 1.5.8\MaskTools.dll")

[danube100]

thanks bro it works....